51767988 has 12 divisors (see below), whose sum is σ = 120792000. Its totient is φ = 17255992.

The previous prime is 51767983. The next prime is 51767993. The reversal of 51767988 is 88976715.

It is an interprime number because it is at equal distance from previous prime (51767983) and next prime (51767993).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 51767988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51767983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156988 + ... + 2157011.

It is an arithmetic number, because the mean of its divisors is an integer number (10066000).

Almost surely, 2^51767988 is an apocalyptic number.

It is an amenable number.

51767988 is an abundant number, since it is smaller than the sum of its proper divisors (69024012).

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

51767988 is a wasteful number, since it uses less digits than its factorization.

51767988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314006 (or 4314004 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 51767988 is about 7194.9974287695. The cubic root of 51767988 is about 372.6951679088.

The spelling of 51767988 in words is "fifty-one million, seven hundred sixty-seven thousand, nine hundred eighty-eight".