102553681 has 2 divisors, whose sum is σ = 102553682. Its totient is φ = 102553680.

The previous prime is 102553663. The next prime is 102553687. The reversal of 102553681 is 186355201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80838081 + 21715600 = 8991^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 102553681 - 2⁷ = 102553553 is a prime.

It is a super-2 number, since 2×102553681² = 21034514973299522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102553687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51276840 + 51276841.

It is an arithmetic number, because the mean of its divisors is an integer number (51276841).

Almost surely, 2^102553681 is an apocalyptic number.

It is an amenable number.

102553681 is a deficient number, since it is larger than the sum of its proper divisors (1).

102553681 is an equidigital number, since it uses as much as digits as its factorization.

102553681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 102553681 is about 10126.8791342644. The cubic root of 102553681 is about 468.0767659035.

The spelling of 102553681 in words is "one hundred two million, five hundred fifty-three thousand, six hundred eighty-one".