51061788 has 36 divisors (see below), whose sum is σ = 129598560. Its totient is φ = 16951296.

The previous prime is 51061783. The next prime is 51061793. The reversal of 51061788 is 88716015.

51061788 is a `hidden beast` number, since 510 + 61 + 7 + 88 = 666.

It is an interprime number because it is at equal distance from previous prime (51061783) and next prime (51061793).

It is a tau number, because it is divible by the number of its divisors (36).

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 (51061781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6493 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (3599960).

Almost surely, 2^51061788 is an apocalyptic number.

It is an amenable number.

51061788 is an abundant number, since it is smaller than the sum of its proper divisors (78536772).

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

51061788 is a wasteful number, since it uses less digits than its factorization.

51061788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5781 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 51061788 is about 7145.7531443508. The cubic root of 51061788 is about 370.9926788780.

The spelling of 51061788 in words is "fifty-one million, sixty-one thousand, seven hundred eighty-eight".