25662031 has 4 divisors (see below), whose sum is σ = 25783864. Its totient is φ = 25540200.

The previous prime is 25661981. The next prime is 25662037. The reversal of 25662031 is 13026652.

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

It is a cyclic number.

It is not a de Polignac number, because 25662031 - 2¹⁹ = 25137743 is a prime.

It is a super-2 number, since 2×25662031² = 1317079670089922, 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 = 25661987 and 25662005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25662037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60600 + ... + 61021.

It is an arithmetic number, because the mean of its divisors is an integer number (6445966).

Almost surely, 2^25662031 is an apocalyptic number.

25662031 is a deficient number, since it is larger than the sum of its proper divisors (121833).

25662031 is a wasteful number, since it uses less digits than its factorization.

25662031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121832.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25662031 is about 5065.7705238196. The cubic root of 25662031 is about 294.9603738788.

Adding to 25662031 its reverse (13026652), we get a palindrome (38688683).

The spelling of 25662031 in words is "twenty-five million, six hundred sixty-two thousand, thirty-one".