25503530 has 16 divisors (see below), whose sum is σ = 49437864. Its totient is φ = 9416640.

The previous prime is 25503523. The next prime is 25503571. The reversal of 25503530 is 3530552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15912121 + 9591409 = 3989^2 + 3097^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25503496 and 25503505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97961 + ... + 98220.

Almost surely, 2^25503530 is an apocalyptic number.

25503530 is a deficient number, since it is larger than the sum of its proper divisors (23934334).

25503530 is a wasteful number, since it uses less digits than its factorization.

25503530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196201.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 25503530 is about 5050.1019791683. The cubic root of 25503530 is about 294.3518471009.

The spelling of 25503530 in words is "twenty-five million, five hundred three thousand, five hundred thirty".