72154316305031 has 2 divisors, whose sum is σ = 72154316305032. Its totient is φ = 72154316305030.

The previous prime is 72154316305021. The next prime is 72154316305061. The reversal of 72154316305031 is 13050361345127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72154316305031 - 2²⁶ = 72154249196167 is a prime.

It is a super-2 number, since 2×72154316305031² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72154316305031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72154316305021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36077158152515 + 36077158152516.

It is an arithmetic number, because the mean of its divisors is an integer number (36077158152516).

Almost surely, 2^{72154316305031} is an apocalyptic number.

72154316305031 is a deficient number, since it is larger than the sum of its proper divisors (1).

72154316305031 is an equidigital number, since it uses as much as digits as its factorization.

72154316305031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 72154316305031 in words is "seventy-two trillion, one hundred fifty-four billion, three hundred sixteen million, three hundred five thousand, thirty-one".