55551313 has 8 divisors (see below), whose sum is σ = 57410496. Its totient is φ = 53718000.

The previous prime is 55551289. The next prime is 55551329. The reversal of 55551313 is 31315555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55551313 - 2¹⁷ = 55420241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55551113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2053 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (7176312).

Almost surely, 2^55551313 is an apocalyptic number.

It is an amenable number.

55551313 is a deficient number, since it is larger than the sum of its proper divisors (1859183).

55551313 is a wasteful number, since it uses less digits than its factorization.

55551313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935.

The product of its digits is 5625, while the sum is 28.

The square root of 55551313 is about 7453.2753202870. The cubic root of 55551313 is about 381.5617009096.

Adding to 55551313 its reverse (31315555), we get a palindrome (86866868).

It can be divided in two parts, 55 and 551313, that added together give a cube (551368 = 82³).

The spelling of 55551313 in words is "fifty-five million, five hundred fifty-one thousand, three hundred thirteen".