155941551 has 8 divisors (see below), whose sum is σ = 231024560. Its totient is φ = 103961016.

The previous prime is 155941549. The next prime is 155941567. The reversal of 155941551 is 155149551.

155941551 is a `hidden beast` number, since 1 + 5 + 594 + 15 + 51 = 666.

It is not a de Polignac number, because 155941551 - 2¹ = 155941549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155941351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2887780 + ... + 2887833.

It is an arithmetic number, because the mean of its divisors is an integer number (28878070).

Almost surely, 2^155941551 is an apocalyptic number.

155941551 is a deficient number, since it is larger than the sum of its proper divisors (75083009).

155941551 is an equidigital number, since it uses as much as digits as its factorization.

155941551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775622 (or 5775616 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 155941551 is about 12487.6559449722. The cubic root of 155941551 is about 538.2540213159.

The spelling of 155941551 in words is "one hundred fifty-five million, nine hundred forty-one thousand, five hundred fifty-one".