51501406 has 8 divisors (see below), whose sum is σ = 84275064. Its totient is φ = 23409720.

The previous prime is 51501397. The next prime is 51501409. The reversal of 51501406 is 60410515.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 2340973 = 51501406 / (5 + 1 + 5 + 0 + 1 + 4 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501409) 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, 1170465 + ... + 1170508.

It is an arithmetic number, because the mean of its divisors is an integer number (10534383).

Almost surely, 2^51501406 is an apocalyptic number.

51501406 is a deficient number, since it is larger than the sum of its proper divisors (32773658).

51501406 is a wasteful number, since it uses less digits than its factorization.

51501406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340986.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51501406 is about 7176.4480071969. The cubic root of 51501406 is about 372.0543287900.

It can be divided in two parts, 5150 and 1406, that added together give a palindrome (6556).

The spelling of 51501406 in words is "fifty-one million, five hundred one thousand, four hundred six".