51312486 has 16 divisors (see below), whose sum is σ = 104157504. Its totient is φ = 16848744.

The previous prime is 51312439. The next prime is 51312487. The reversal of 51312486 is 68421315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312487) 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, 63420 + ... + 64223.

It is an arithmetic number, because the mean of its divisors is an integer number (6509844).

Almost surely, 2^51312486 is an apocalyptic number.

51312486 is an abundant number, since it is smaller than the sum of its proper divisors (52845018).

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

51312486 is a wasteful number, since it uses less digits than its factorization.

51312486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127715.

The product of its digits is 5760, while the sum is 30.

The square root of 51312486 is about 7163.2734137404. The cubic root of 51312486 is about 371.5988420367.

The spelling of 51312486 in words is "fifty-one million, three hundred twelve thousand, four hundred eighty-six".