102400523 has 2 divisors, whose sum is σ = 102400524. Its totient is φ = 102400522.

The previous prime is 102400489. The next prime is 102400541. The reversal of 102400523 is 325004201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102400523 - 2¹⁰ = 102399499 is a prime.

It is a super-2 number, since 2×102400523² = 20971734221347058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102400553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51200261 + 51200262.

It is an arithmetic number, because the mean of its divisors is an integer number (51200262).

Almost surely, 2^102400523 is an apocalyptic number.

102400523 is a deficient number, since it is larger than the sum of its proper divisors (1).

102400523 is an equidigital number, since it uses as much as digits as its factorization.

102400523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 102400523 is about 10119.3143542436. The cubic root of 102400523 is about 467.8436346030.

Adding to 102400523 its reverse (325004201), we get a palindrome (427404724).

The spelling of 102400523 in words is "one hundred two million, four hundred thousand, five hundred twenty-three".