51057648 has 40 divisors (see below), whose sum is σ = 146555600. Its totient is φ = 17019072.

The previous prime is 51057637. The next prime is 51057649. The reversal of 51057648 is 84675015.

51057648 is a `hidden beast` number, since 5 + 1 + 0 + 5 + 7 + 648 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51057649) 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, 58663 + ... + 59526.

It is an arithmetic number, because the mean of its divisors is an integer number (3663890).

Almost surely, 2^51057648 is an apocalyptic number.

It is an amenable number.

51057648 is an abundant number, since it is smaller than the sum of its proper divisors (95497952).

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

51057648 is a wasteful number, since it uses less digits than its factorization.

51057648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118206 (or 118194 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 51057648 is about 7145.4634559278. The cubic root of 51057648 is about 370.9826521290.

The spelling of 51057648 in words is "fifty-one million, fifty-seven thousand, six hundred forty-eight".