102257081 has 2 divisors, whose sum is σ = 102257082. Its totient is φ = 102257080.

The previous prime is 102257039. The next prime is 102257093. The reversal of 102257081 is 180752201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101687056 + 570025 = 10084^2 + 755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102257081 is a prime.

It is a super-2 number, since 2×102257081² = 20913021229281122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102257081.

It is not a weakly prime, because it can be changed into another prime (102257681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51128540 + 51128541.

It is an arithmetic number, because the mean of its divisors is an integer number (51128541).

Almost surely, 2^102257081 is an apocalyptic number.

It is an amenable number.

102257081 is a deficient number, since it is larger than the sum of its proper divisors (1).

102257081 is an equidigital number, since it uses as much as digits as its factorization.

102257081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 102257081 is about 10112.2243349324. The cubic root of 102257081 is about 467.6250817281.

It can be divided in two parts, 102 and 257081, that multiplied together give a palindrome (26222262).

The spelling of 102257081 in words is "one hundred two million, two hundred fifty-seven thousand, eighty-one".