102530251 has 18 divisors (see below), whose sum is σ = 113951180. Its totient is φ = 91990800.

The previous prime is 102530243. The next prime is 102530257. The reversal of 102530251 is 152035201.

It is not a de Polignac number, because 102530251 - 2³ = 102530243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102530257) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1015101 + ... + 1015201.

Almost surely, 2^102530251 is an apocalyptic number.

102530251 is a deficient number, since it is larger than the sum of its proper divisors (11420929).

102530251 is an equidigital number, since it uses as much as digits as its factorization.

102530251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 102530251 is about 10125.7222458450. The cubic root of 102530251 is about 468.0411166909.

Multiplying 102530251 by its sum of digits (19), we get a square (1948074769 = 44137²).

102530251 divided by its sum of digits (19) gives a square (5396329 = 2323²).

Adding to 102530251 its reverse (152035201), we get a palindrome (254565452).

The spelling of 102530251 in words is "one hundred two million, five hundred thirty thousand, two hundred fifty-one".