25606631 has 4 divisors (see below), whose sum is σ = 25860264. Its totient is φ = 25353000.

The previous prime is 25606621. The next prime is 25606639. The reversal of 25606631 is 13660652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25606631 is a prime.

It is a super-2 number, since 2×25606631² = 1311399102340322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25606594 and 25606603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25606639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126665 + ... + 126866.

It is an arithmetic number, because the mean of its divisors is an integer number (6465066).

Almost surely, 2^25606631 is an apocalyptic number.

25606631 is a deficient number, since it is larger than the sum of its proper divisors (253633).

25606631 is a wasteful number, since it uses less digits than its factorization.

25606631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253632.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25606631 is about 5060.2994970654. The cubic root of 25606631 is about 294.7479643745.

The spelling of 25606631 in words is "twenty-five million, six hundred six thousand, six hundred thirty-one".