51638022 has 12 divisors (see below), whose sum is σ = 111882420. Its totient is φ = 17212668.

The previous prime is 51638011. The next prime is 51638023. The reversal of 51638022 is 22083615.

51638022 is a `hidden beast` number, since 5 + 1 + 638 + 0 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51638023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1434372 + ... + 1434407.

It is an arithmetic number, because the mean of its divisors is an integer number (9323535).

Almost surely, 2^51638022 is an apocalyptic number.

51638022 is an abundant number, since it is smaller than the sum of its proper divisors (60244398).

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

51638022 is a wasteful number, since it uses less digits than its factorization.

51638022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868787 (or 2868784 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51638022 is about 7185.9600611192. The cubic root of 51638022 is about 372.3830168817.

The spelling of 51638022 in words is "fifty-one million, six hundred thirty-eight thousand, twenty-two".