155931053 has 4 divisors (see below), whose sum is σ = 162710688. Its totient is φ = 149151420.

The previous prime is 155931049. The next prime is 155931091. The reversal of 155931053 is 350139551.

It is a happy number.

155931053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350139551 = 131 ⋅2672821.

It is a cyclic number.

It is not a de Polignac number, because 155931053 - 2² = 155931049 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 (155931553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3389783 + ... + 3389828.

It is an arithmetic number, because the mean of its divisors is an integer number (40677672).

Almost surely, 2^155931053 is an apocalyptic number.

It is an amenable number.

155931053 is a deficient number, since it is larger than the sum of its proper divisors (6779635).

155931053 is an equidigital number, since it uses as much as digits as its factorization.

155931053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779634.

The product of its (nonzero) digits is 10125, while the sum is 32.

The square root of 155931053 is about 12487.2356028066. The cubic root of 155931053 is about 538.2419426076.

The spelling of 155931053 in words is "one hundred fifty-five million, nine hundred thirty-one thousand, fifty-three".