51263331 has 8 divisors (see below), whose sum is σ = 78115584. Its totient is φ = 29293320.

The previous prime is 51263327. The next prime is 51263341. The reversal of 51263331 is 13336215.

It is a happy number.

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

It is not a de Polignac number, because 51263331 - 2² = 51263327 is a prime.

It is a super-2 number, since 2×51263331² = 5255858210431122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51263321) 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, 1220535 + ... + 1220576.

It is an arithmetic number, because the mean of its divisors is an integer number (9764448).

Almost surely, 2^51263331 is an apocalyptic number.

51263331 is a deficient number, since it is larger than the sum of its proper divisors (26852253).

51263331 is a wasteful number, since it uses less digits than its factorization.

51263331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441121.

The product of its digits is 1620, while the sum is 24.

The square root of 51263331 is about 7159.8415485261. The cubic root of 51263331 is about 371.4801459307.

Adding to 51263331 its reverse (13336215), we get a palindrome (64599546).

The spelling of 51263331 in words is "fifty-one million, two hundred sixty-three thousand, three hundred thirty-one".