51398032 has 80 divisors (see below), whose sum is σ = 119119360. Its totient is φ = 21026304.

The previous prime is 51398003. The next prime is 51398033. The reversal of 51398032 is 23089315.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51397985 and 51398003.

It is not an unprimeable number, because it can be changed into a prime (51398033) 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, 327298 + ... + 327454.

It is an arithmetic number, because the mean of its divisors is an integer number (1488992).

Almost surely, 2^51398032 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 51398032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59559680).

51398032 is an abundant number, since it is smaller than the sum of its proper divisors (67721328).

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

51398032 is a wasteful number, since it uses less digits than its factorization.

51398032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 51398032 is about 7169.2420798854. The cubic root of 51398032 is about 371.8052319931.

The spelling of 51398032 in words is "fifty-one million, three hundred ninety-eight thousand, thirty-two".