155131146 has 32 divisors (see below), whose sum is σ = 347800320. Its totient is φ = 51250752.

The previous prime is 155131133. The next prime is 155131147. The reversal of 155131146 is 641131551.

155131146 is a `hidden beast` number, since 1 + 5 + 513 + 1 + 146 = 666.

155131146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (155131147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6610 + ... + 18813.

It is an arithmetic number, because the mean of its divisors is an integer number (10868760).

Almost surely, 2^155131146 is an apocalyptic number.

155131146 is an abundant number, since it is smaller than the sum of its proper divisors (192669174).

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

155131146 is a wasteful number, since it uses less digits than its factorization.

155131146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25547 (or 25541 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 155131146 is about 12455.1654344693. The cubic root of 155131146 is about 537.3199927966.

Adding to 155131146 its reverse (641131551), we get a palindrome (796262697).

The spelling of 155131146 in words is "one hundred fifty-five million, one hundred thirty-one thousand, one hundred forty-six".