25436131 has 32 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 19408896.

The previous prime is 25436093. The next prime is 25436189. The reversal of 25436131 is 13163452.

It is a cyclic number.

It is not a de Polignac number, because 25436131 - 2¹⁵ = 25403363 is a prime.

It is a super-2 number, since 2×25436131² = 1293993520498322, 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 = 25436096 and 25436105.

It is not an unprimeable number, because it can be changed into a prime (25436731) 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 31 ways as a sum of consecutive naturals, for example, 233305 + ... + 233413.

It is an arithmetic number, because the mean of its divisors is an integer number (1015740).

Almost surely, 2^25436131 is an apocalyptic number.

25436131 is a deficient number, since it is larger than the sum of its proper divisors (7067549).

25436131 is a wasteful number, since it uses less digits than its factorization.

25436131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

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

The square root of 25436131 is about 5043.4245310107. The cubic root of 25436131 is about 294.0923206451.

Adding to 25436131 its reverse (13163452), we get a palindrome (38599583).

The spelling of 25436131 in words is "twenty-five million, four hundred thirty-six thousand, one hundred thirty-one".