102157331 has 2 divisors, whose sum is σ = 102157332. Its totient is φ = 102157330.

The previous prime is 102157309. The next prime is 102157339. The reversal of 102157331 is 133751201.

It is a strong prime.

It is an emirp because it is prime and its reverse (133751201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102157331 is a prime.

It is a super-2 number, since 2×102157331² = 20872240554087122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102157297 and 102157306.

It is not a weakly prime, because it can be changed into another prime (102157339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51078665 + 51078666.

It is an arithmetic number, because the mean of its divisors is an integer number (51078666).

Almost surely, 2^102157331 is an apocalyptic number.

102157331 is a deficient number, since it is larger than the sum of its proper divisors (1).

102157331 is an equidigital number, since it uses as much as digits as its factorization.

102157331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 102157331 is about 10107.2909822563. The cubic root of 102157331 is about 467.4729788876.

The spelling of 102157331 in words is "one hundred two million, one hundred fifty-seven thousand, three hundred thirty-one".