155789431 has 8 divisors (see below), whose sum is σ = 178140960. Its totient is φ = 133461888.

The previous prime is 155789383. The next prime is 155789471. The reversal of 155789431 is 134987551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155789431 - 2¹¹ = 155787383 is a prime.

It is a super-2 number, since 2×155789431² = 48540693622607522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155789471) 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 7 ways as a sum of consecutive naturals, for example, 11235 + ... + 20923.

It is an arithmetic number, because the mean of its divisors is an integer number (22267620).

Almost surely, 2^155789431 is an apocalyptic number.

155789431 is a deficient number, since it is larger than the sum of its proper divisors (22351529).

155789431 is an equidigital number, since it uses as much as digits as its factorization.

155789431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11993.

The product of its digits is 151200, while the sum is 43.

The square root of 155789431 is about 12481.5636440311. The cubic root of 155789431 is about 538.0789432395.

The spelling of 155789431 in words is "one hundred fifty-five million, seven hundred eighty-nine thousand, four hundred thirty-one".