51118488 has 96 divisors (see below), whose sum is σ = 143339040. Its totient is φ = 16450560.

The previous prime is 51118481. The next prime is 51118499. The reversal of 51118488 is 88481115.

It is a happy number.

It is a super-2 number, since 2×51118488² = 5226199630812288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51118481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452320 + ... + 452432.

It is an arithmetic number, because the mean of its divisors is an integer number (1493115).

Almost surely, 2^51118488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51118488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71669520).

51118488 is an abundant number, since it is smaller than the sum of its proper divisors (92220552).

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

51118488 is a wasteful number, since it uses less digits than its factorization.

51118488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 282 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 51118488 is about 7149.7194350548. The cubic root of 51118488 is about 371.1299472380.

The spelling of 51118488 in words is "fifty-one million, one hundred eighteen thousand, four hundred eighty-eight".