51113132 has 48 divisors (see below), whose sum is σ = 106229760. Its totient is φ = 21062592.

The previous prime is 51113131. The next prime is 51113137. The reversal of 51113132 is 23131115.

It is a super-2 number, since 2×51113132² = 5225104525698848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51113132.

It is not an unprimeable number, because it can be changed into a prime (51113131) 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, 106469 + ... + 106947.

It is an arithmetic number, because the mean of its divisors is an integer number (2213120).

Almost surely, 2^51113132 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 51113132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53114880).

51113132 is an abundant number, since it is smaller than the sum of its proper divisors (55116628).

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

51113132 is a wasteful number, since it uses less digits than its factorization.

51113132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 628 counting only the distinct ones).

The product of its digits is 90, while the sum is 17.

The square root of 51113132 is about 7149.3448650908. The cubic root of 51113132 is about 371.1169849257.

Adding to 51113132 its reverse (23131115), we get a palindrome (74244247).

The spelling of 51113132 in words is "fifty-one million, one hundred thirteen thousand, one hundred thirty-two".