51331355 has 4 divisors (see below), whose sum is σ = 61597632. Its totient is φ = 41065080.

The previous prime is 51331351. The next prime is 51331361. The reversal of 51331355 is 55313315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55313315 = 5 ⋅11062663.

It is not a de Polignac number, because 51331355 - 2² = 51331351 is a prime.

It is a super-2 number, since 2×51331355² = 5269816012272050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51331351) 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, 5133131 + ... + 5133140.

It is an arithmetic number, because the mean of its divisors is an integer number (15399408).

Almost surely, 2^51331355 is an apocalyptic number.

51331355 is a deficient number, since it is larger than the sum of its proper divisors (10266277).

51331355 is a wasteful number, since it uses less digits than its factorization.

51331355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266276.

The product of its digits is 3375, while the sum is 26.

The square root of 51331355 is about 7164.5903581433. The cubic root of 51331355 is about 371.6443854630.

The spelling of 51331355 in words is "fifty-one million, three hundred thirty-one thousand, three hundred fifty-five".