51401005 has 4 divisors (see below), whose sum is σ = 61681212. Its totient is φ = 41120800.

The previous prime is 51400991. The next prime is 51401027. The reversal of 51401005 is 50010415.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 41951529 = 3074^2 + 6477^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51401005 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51401005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5140096 + ... + 5140105.

It is an arithmetic number, because the mean of its divisors is an integer number (15420303).

Almost surely, 2^51401005 is an apocalyptic number.

It is an amenable number.

51401005 is a deficient number, since it is larger than the sum of its proper divisors (10280207).

51401005 is a wasteful number, since it uses less digits than its factorization.

51401005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10280206.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51401005 is about 7169.4494209807. The cubic root of 51401005 is about 371.8124005921.

The spelling of 51401005 in words is "fifty-one million, four hundred one thousand, five".