51396608 has 30 divisors (see below), whose sum is σ = 102822846. Its totient is φ = 25690112.

The previous prime is 51396607. The next prime is 51396617. The reversal of 51396608 is 80669315.

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 16384 = 7168^2 + 128^2 .

It is a super-2 number, since 2×51396608² = 5283222627811328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51396607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14816 + ... + 17952.

Almost surely, 2^51396608 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 51396608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51411423).

51396608 is an abundant number, since it is smaller than the sum of its proper divisors (51426238).

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

51396608 is an frugal number, since it uses more digits than its factorization.

51396608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 51396608 is about 7169.1427660495. The cubic root of 51396608 is about 371.8017982978.

The spelling of 51396608 in words is "fifty-one million, three hundred ninety-six thousand, six hundred eight".