25990213 has 4 divisors (see below), whose sum is σ = 26036460. Its totient is φ = 25943968.

The previous prime is 25990147. The next prime is 25990247. The reversal of 25990213 is 31209952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14273284 + 11716929 = 3778^2 + 3423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25990213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25990273) 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, 22270 + ... + 23407.

It is an arithmetic number, because the mean of its divisors is an integer number (6509115).

Almost surely, 2^25990213 is an apocalyptic number.

It is an amenable number.

25990213 is a deficient number, since it is larger than the sum of its proper divisors (46247).

25990213 is an equidigital number, since it uses as much as digits as its factorization.

25990213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46246.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25990213 is about 5098.0597289557. The cubic root of 25990213 is about 296.2124304461.

The spelling of 25990213 in words is "twenty-five million, nine hundred ninety thousand, two hundred thirteen".