551642313 has 16 divisors (see below), whose sum is σ = 754846400. Its totient is φ = 358150464.

The previous prime is 551642309. The next prime is 551642317. The reversal of 551642313 is 313246155.

It is an interprime number because it is at equal distance from previous prime (551642309) and next prime (551642317).

It is not a de Polignac number, because 551642313 - 2² = 551642309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551642317) 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, 38895 + ... + 51147.

It is an arithmetic number, because the mean of its divisors is an integer number (47177900).

Almost surely, 2^551642313 is an apocalyptic number.

It is an amenable number.

551642313 is a deficient number, since it is larger than the sum of its proper divisors (203204087).

551642313 is a wasteful number, since it uses less digits than its factorization.

551642313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12648.

The product of its digits is 10800, while the sum is 30.

The square root of 551642313 is about 23487.0669305471. The cubic root of 551642313 is about 820.1359644661.

Adding to 551642313 its reverse (313246155), we get a palindrome (864888468).

The spelling of 551642313 in words is "five hundred fifty-one million, six hundred forty-two thousand, three hundred thirteen".