155131648 has 108 divisors (see below), whose sum is σ = 367000200. Its totient is φ = 65243136.

The previous prime is 155131609. The next prime is 155131649. The reversal of 155131648 is 846131551.

It is a super-2 number, since 2×155131648² = 48131656422391808, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155131649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1041078 + ... + 1041226.

It is an arithmetic number, because the mean of its divisors is an integer number (3398150).

Almost surely, 2^155131648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155131648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183500100).

155131648 is an abundant number, since it is smaller than the sum of its proper divisors (211868552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155131648 is an equidigital number, since it uses as much as digits as its factorization.

155131648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 241 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 155131648 is about 12455.1855867345. The cubic root of 155131648 is about 537.3205723800.

It can be divided in two parts, 15513 and 1648, that added together give a square (17161 = 131²).

The spelling of 155131648 in words is "one hundred fifty-five million, one hundred thirty-one thousand, six hundred forty-eight".