51603888 has 80 divisors (see below), whose sum is σ = 153133056. Its totient is φ = 14668800.

The previous prime is 51603883. The next prime is 51603907. The reversal of 51603888 is 88830615.

It is a happy number.

It is a super-2 number, since 2×51603888² = 5325922513433088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51603883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128488 + ... + 128888.

Almost surely, 2^51603888 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 51603888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76566528).

51603888 is an abundant number, since it is smaller than the sum of its proper divisors (101529168).

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

51603888 is a wasteful number, since it uses less digits than its factorization.

51603888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 51603888 is about 7183.5846205081. The cubic root of 51603888 is about 372.3009473576.

The spelling of 51603888 in words is "fifty-one million, six hundred three thousand, eight hundred eighty-eight".