25533013 has 16 divisors (see below), whose sum is σ = 29753856. Its totient is φ = 21677040.

The previous prime is 25533007. The next prime is 25533023. The reversal of 25533013 is 31033552.

It is a happy number.

It is not a de Polignac number, because 25533013 - 2⁵ = 25532981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533023) 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, 9706 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (1859616).

Almost surely, 2^25533013 is an apocalyptic number.

25533013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25533013 is a deficient number, since it is larger than the sum of its proper divisors (4220843).

25533013 is a wasteful number, since it uses less digits than its factorization.

25533013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 25533013 is about 5053.0201859878. The cubic root of 25533013 is about 294.4652305355.

Adding to 25533013 its reverse (31033552), we get a palindrome (56566565).

The spelling of 25533013 in words is "twenty-five million, five hundred thirty-three thousand, thirteen".