25487511 has 16 divisors (see below), whose sum is σ = 38916864. Its totient is φ = 14534784.

The previous prime is 25487479. The next prime is 25487521. The reversal of 25487511 is 11578452.

It is not a de Polignac number, because 25487511 - 2⁵ = 25487479 is a prime.

It is a super-2 number, since 2×25487511² = 1299226433950242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25487521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13455 + ... + 15231.

It is an arithmetic number, because the mean of its divisors is an integer number (2432304).

Almost surely, 2^25487511 is an apocalyptic number.

25487511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25487511 is a deficient number, since it is larger than the sum of its proper divisors (13429353).

25487511 is a wasteful number, since it uses less digits than its factorization.

25487511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470.

The product of its digits is 11200, while the sum is 33.

The square root of 25487511 is about 5048.5157224673. The cubic root of 25487511 is about 294.2902058325.

The spelling of 25487511 in words is "twenty-five million, four hundred eighty-seven thousand, five hundred eleven".