51405351 has 8 divisors (see below), whose sum is σ = 68659584. Its totient is φ = 34210680.

The previous prime is 51405337. The next prime is 51405353. The reversal of 51405351 is 15350415.

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

It is a de Polignac number, because none of the positive numbers 2^k-51405351 is a prime.

It is a super-2 number, since 2×51405351² = 5285020222866402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405353) 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, 12835 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (8582448).

Almost surely, 2^51405351 is an apocalyptic number.

51405351 is a deficient number, since it is larger than the sum of its proper divisors (17254233).

51405351 is a wasteful number, since it uses less digits than its factorization.

51405351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29781.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51405351 is about 7169.7525061888. The cubic root of 51405351 is about 371.8228793182.

Adding to 51405351 its reverse (15350415), we get a palindrome (66755766).

The spelling of 51405351 in words is "fifty-one million, four hundred five thousand, three hundred fifty-one".