155961351 has 48 divisors (see below), whose sum is σ = 282574656. Its totient is φ = 80690688.

The previous prime is 155961347. The next prime is 155961359. The reversal of 155961351 is 153169551.

155961351 is a `hidden beast` number, since 1 + 5 + 596 + 13 + 51 = 666.

It is not a de Polignac number, because 155961351 - 2² = 155961347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155961359) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41611 + ... + 45203.

It is an arithmetic number, because the mean of its divisors is an integer number (5886972).

Almost surely, 2^155961351 is an apocalyptic number.

155961351 is a deficient number, since it is larger than the sum of its proper divisors (126613305).

155961351 is a wasteful number, since it uses less digits than its factorization.

155961351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672 (or 3669 counting only the distinct ones).

The product of its digits is 20250, while the sum is 36.

The square root of 155961351 is about 12488.4487027012. The cubic root of 155961351 is about 538.2768011727.

The spelling of 155961351 in words is "one hundred fifty-five million, nine hundred sixty-one thousand, three hundred fifty-one".