51618488 has 8 divisors (see below), whose sum is σ = 96784680. Its totient is φ = 25809240.

The previous prime is 51618473. The next prime is 51618499. The reversal of 51618488 is 88481615.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×51618488² = 5328936606812288, which contains 22 as substring.

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, 3226148 + ... + 3226163.

It is an arithmetic number, because the mean of its divisors is an integer number (12098085).

Almost surely, 2^51618488 is an apocalyptic number.

It is an amenable number.

51618488 is a deficient number, since it is larger than the sum of its proper divisors (45166192).

51618488 is a wasteful number, since it uses less digits than its factorization.

51618488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452317 (or 6452313 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 51618488 is about 7184.6007543913. The cubic root of 51618488 is about 372.3360550565.

The spelling of 51618488 in words is "fifty-one million, six hundred eighteen thousand, four hundred eighty-eight".