23212357771157 has 2 divisors, whose sum is σ = 23212357771158. Its totient is φ = 23212357771156.

The previous prime is 23212357771147. The next prime is 23212357771219. The reversal of 23212357771157 is 75117775321232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19126356410161 + 4086001360996 = 4373369^2 + 2021386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23212357771157 is a prime.

It is a super-2 number, since 2×23212357771157² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23212357771099 and 23212357771108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23212357771147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606178885578 + 11606178885579.

It is an arithmetic number, because the mean of its divisors is an integer number (11606178885579).

Almost surely, 2^{23212357771157} is an apocalyptic number.

It is an amenable number.

23212357771157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212357771157 is an equidigital number, since it uses as much as digits as its factorization.

23212357771157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4321800, while the sum is 53.

The spelling of 23212357771157 in words is "twenty-three trillion, two hundred twelve billion, three hundred fifty-seven million, seven hundred seventy-one thousand, one hundred fifty-seven".