25381013 has 4 divisors (see below), whose sum is σ = 29006880. Its totient is φ = 21755148.

The previous prime is 25380991. The next prime is 25381067. The reversal of 25381013 is 31018352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25381013 - 2¹⁸ = 25118869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25381013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25381073) 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, 1812923 + ... + 1812936.

It is an arithmetic number, because the mean of its divisors is an integer number (7251720).

Almost surely, 2^25381013 is an apocalyptic number.

It is an amenable number.

25381013 is a deficient number, since it is larger than the sum of its proper divisors (3625867).

25381013 is an equidigital number, since it uses as much as digits as its factorization.

25381013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625866.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 25381013 is about 5037.9572249077. The cubic root of 25381013 is about 293.8797424158.

Adding to 25381013 its reverse (31018352), we get a palindrome (56399365).

The spelling of 25381013 in words is "twenty-five million, three hundred eighty-one thousand, thirteen".