51988988 has 6 divisors (see below), whose sum is σ = 90980736. Its totient is φ = 25994492.

The previous prime is 51988957. The next prime is 51988991. The reversal of 51988988 is 88988915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6498620 + ... + 6498627.

It is an arithmetic number, because the mean of its divisors is an integer number (15163456).

Almost surely, 2^51988988 is an apocalyptic number.

It is an amenable number.

51988988 is a deficient number, since it is larger than the sum of its proper divisors (38991748).

51988988 is a wasteful number, since it uses less digits than its factorization.

51988988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997251 (or 12997249 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 56.

The square root of 51988988 is about 7210.3389656798. The cubic root of 51988988 is about 373.2247661211.

The spelling of 51988988 in words is "fifty-one million, nine hundred eighty-eight thousand, nine hundred eighty-eight".