165424757231 has 2 divisors, whose sum is σ = 165424757232. Its totient is φ = 165424757230.

The previous prime is 165424757219. The next prime is 165424757237. The reversal of 165424757231 is 132757424561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165424757231 - 2⁶ = 165424757167 is a prime.

It is a super-2 number, since 2×165424757231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165424757237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82712378615 + 82712378616.

It is an arithmetic number, because the mean of its divisors is an integer number (82712378616).

Almost surely, 2^165424757231 is an apocalyptic number.

165424757231 is a deficient number, since it is larger than the sum of its proper divisors (1).

165424757231 is an equidigital number, since it uses as much as digits as its factorization.

165424757231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 47.

The spelling of 165424757231 in words is "one hundred sixty-five billion, four hundred twenty-four million, seven hundred fifty-seven thousand, two hundred thirty-one".