51277392 has 30 divisors (see below), whose sum is σ = 143505882. Its totient is φ = 17092416.

The previous prime is 51277381. The next prime is 51277403. The reversal of 51277392 is 29377215.

It is an interprime number because it is at equal distance from previous prime (51277381) and next prime (51277403).

It can be written as a sum of positive squares in only one way, i.e., 38489616 + 12787776 = 6204^2 + 3576^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177903 + ... + 178190.

Almost surely, 2^51277392 is an apocalyptic number.

It is an amenable number.

51277392 is an abundant number, since it is smaller than the sum of its proper divisors (92228490).

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

51277392 is a wasteful number, since it uses less digits than its factorization.

51277392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356107 (or 356098 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 51277392 is about 7160.8234163398. The cubic root of 51277392 is about 371.5141072096.

The spelling of 51277392 in words is "fifty-one million, two hundred seventy-seven thousand, three hundred ninety-two".