156451031151231 has 4 divisors (see below), whose sum is σ = 208601374868312. Its totient is φ = 104300687434152.

The previous prime is 156451031151223. The next prime is 156451031151269. The reversal of 156451031151231 is 132151130154651.

156451031151231 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.

It is not a de Polignac number, because 156451031151231 - 2³ = 156451031151223 is a prime.

It is a super-2 number, since 2×156451031151231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156451031151231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156451031151431) 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, 26075171858536 + ... + 26075171858541.

It is an arithmetic number, because the mean of its divisors is an integer number (52150343717078).

Almost surely, 2^{156451031151231} is an apocalyptic number.

156451031151231 is a deficient number, since it is larger than the sum of its proper divisors (52150343717081).

156451031151231 is an equidigital number, since it uses as much as digits as its factorization.

156451031151231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52150343717080.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 156451031151231 in words is "one hundred fifty-six trillion, four hundred fifty-one billion, thirty-one million, one hundred fifty-one thousand, two hundred thirty-one".