102212557 has 2 divisors, whose sum is σ = 102212558. Its totient is φ = 102212556.

The previous prime is 102212543. The next prime is 102212563. The reversal of 102212557 is 755212201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 13645636 = 9411^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 102212557 - 2¹¹ = 102210509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102212507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106278 + 51106279.

It is an arithmetic number, because the mean of its divisors is an integer number (51106279).

Almost surely, 2^102212557 is an apocalyptic number.

It is an amenable number.

102212557 is a deficient number, since it is larger than the sum of its proper divisors (1).

102212557 is an equidigital number, since it uses as much as digits as its factorization.

102212557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 102212557 is about 10110.0226013595. The cubic root of 102212557 is about 467.5572019572.

Adding to 102212557 its reverse (755212201), we get a palindrome (857424758).

The spelling of 102212557 in words is "one hundred two million, two hundred twelve thousand, five hundred fifty-seven".