25515050 has 48 divisors (see below), whose sum is σ = 54050112. Its totient is φ = 8870400.

The previous prime is 25515029. The next prime is 25515053. The reversal of 25515050 is 5051552.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25515053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11642 + ... + 13658.

It is an arithmetic number, because the mean of its divisors is an integer number (1126044).

Almost surely, 2^25515050 is an apocalyptic number.

25515050 is an abundant number, since it is smaller than the sum of its proper divisors (28535062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25515050 is a wasteful number, since it uses less digits than its factorization.

25515050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 25515050 is about 5051.2424214247. The cubic root of 25515050 is about 294.3961602194.

The spelling of 25515050 in words is "twenty-five million, five hundred fifteen thousand, fifty".