25263131 has 4 divisors (see below), whose sum is σ = 26361552. Its totient is φ = 24164712.

The previous prime is 25263113. The next prime is 25263137. The reversal of 25263131 is 13136252.

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-25263131 is a prime.

It is a super-2 number, since 2×25263131² = 1276451575846322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1098397 = 25263131 / (2 + 5 + 2 + 6 + 3 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25263097 and 25263106.

It is not an unprimeable number, because it can be changed into a prime (25263137) 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, 549176 + ... + 549221.

It is an arithmetic number, because the mean of its divisors is an integer number (6590388).

Almost surely, 2^25263131 is an apocalyptic number.

25263131 is a deficient number, since it is larger than the sum of its proper divisors (1098421).

25263131 is a wasteful number, since it uses less digits than its factorization.

25263131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098420.

The product of its digits is 1080, while the sum is 23.

The square root of 25263131 is about 5026.2442240703. The cubic root of 25263131 is about 293.4240618394.

Adding to 25263131 its reverse (13136252), we get a palindrome (38399383).

The spelling of 25263131 in words is "twenty-five million, two hundred sixty-three thousand, one hundred thirty-one".