51051438 has 16 divisors (see below), whose sum is σ = 113447760. Its totient is φ = 17017128.

The previous prime is 51051419. The next prime is 51051487. The reversal of 51051438 is 83415015.

51051438 is a `hidden beast` number, since 510 + 5 + 143 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 472645 + ... + 472752.

It is an arithmetic number, because the mean of its divisors is an integer number (7090485).

Almost surely, 2^51051438 is an apocalyptic number.

51051438 is an abundant number, since it is smaller than the sum of its proper divisors (62396322).

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

51051438 is a wasteful number, since it uses less digits than its factorization.

51051438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945408 (or 945402 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51051438 is about 7145.0289012711. The cubic root of 51051438 is about 370.9676109891.

The spelling of 51051438 in words is "fifty-one million, fifty-one thousand, four hundred thirty-eight".