155313550 has 24 divisors (see below), whose sum is σ = 330152976. Its totient is φ = 53250240.

The previous prime is 155313523. The next prime is 155313551. The reversal of 155313550 is 55313551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155313551) 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, 221527 + ... + 222226.

It is an arithmetic number, because the mean of its divisors is an integer number (13756374).

Almost surely, 2^155313550 is an apocalyptic number.

155313550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155313550 is an abundant number, since it is smaller than the sum of its proper divisors (174839426).

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

155313550 is a wasteful number, since it uses less digits than its factorization.

155313550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443772 (or 443767 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 155313550 is about 12462.4857071132. The cubic root of 155313550 is about 537.5305048489.

Subtracting from 155313550 its reverse (55313551), we obtain a palindrome (99999999).

The spelling of 155313550 in words is "one hundred fifty-five million, three hundred thirteen thousand, five hundred fifty".