25551313 has 4 divisors (see below), whose sum is σ = 25799488. Its totient is φ = 25303140.

The previous prime is 25551299. The next prime is 25551329. The reversal of 25551313 is 31315552.

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 a de Polignac number, because none of the positive numbers 2^k-25551313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25551343) 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, 123933 + ... + 124138.

It is an arithmetic number, because the mean of its divisors is an integer number (6449872).

Almost surely, 2^25551313 is an apocalyptic number.

It is an amenable number.

25551313 is a deficient number, since it is larger than the sum of its proper divisors (248175).

25551313 is a wasteful number, since it uses less digits than its factorization.

25551313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248174.

The product of its digits is 2250, while the sum is 25.

The square root of 25551313 is about 5054.8306598738. The cubic root of 25551313 is about 294.5355633609.

Adding to 25551313 its reverse (31315552), we get a palindrome (56866865).

The spelling of 25551313 in words is "twenty-five million, five hundred fifty-one thousand, three hundred thirteen".