25232581 has 16 divisors (see below), whose sum is σ = 28848960. Its totient is φ = 21857920.

The previous prime is 25232579. The next prime is 25232591. The reversal of 25232581 is 18523252.

It is a cyclic number.

It is not a de Polignac number, because 25232581 - 2¹ = 25232579 is a prime.

It is a super-2 number, since 2×25232581² = 1273366287843122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25232591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26001 + ... + 26953.

It is an arithmetic number, because the mean of its divisors is an integer number (1803060).

Almost surely, 2^25232581 is an apocalyptic number.

It is an amenable number.

25232581 is a deficient number, since it is larger than the sum of its proper divisors (3616379).

25232581 is a wasteful number, since it uses less digits than its factorization.

25232581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076.

The product of its digits is 4800, while the sum is 28.

The square root of 25232581 is about 5023.2042562492. The cubic root of 25232581 is about 293.3057376186.

The spelling of 25232581 in words is "twenty-five million, two hundred thirty-two thousand, five hundred eighty-one".