51369870 has 16 divisors (see below), whose sum is σ = 123287760. Its totient is φ = 13698624.

The previous prime is 51369841. The next prime is 51369953. The reversal of 51369870 is 7896315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856135 + ... + 856194.

It is an arithmetic number, because the mean of its divisors is an integer number (7705485).

Almost surely, 2^51369870 is an apocalyptic number.

51369870 is an abundant number, since it is smaller than the sum of its proper divisors (71917890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51369870 is a wasteful number, since it uses less digits than its factorization.

51369870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712339.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 51369870 is about 7167.2777258873. The cubic root of 51369870 is about 371.7373131027.

The spelling of 51369870 in words is "fifty-one million, three hundred sixty-nine thousand, eight hundred seventy".