25531623 has 24 divisors (see below), whose sum is σ = 40321008. Its totient is φ = 15472512.

The previous prime is 25531621. The next prime is 25531651. The reversal of 25531623 is 32613552.

25531623 is a `hidden beast` number, since 2 + 5 + 5 + 31 + 623 = 666.

It is not a de Polignac number, because 25531623 - 2¹ = 25531621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25531621) 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 23 ways as a sum of consecutive naturals, for example, 6211 + ... + 9467.

It is an arithmetic number, because the mean of its divisors is an integer number (1680042).

Almost surely, 2^25531623 is an apocalyptic number.

25531623 is a deficient number, since it is larger than the sum of its proper divisors (14789385).

25531623 is a wasteful number, since it uses less digits than its factorization.

25531623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343 (or 3340 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 25531623 is about 5052.8826426110. The cubic root of 25531623 is about 294.4598869424.

It can be divided in two parts, 255 and 31623, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 25531623 in words is "twenty-five million, five hundred thirty-one thousand, six hundred twenty-three".