51130632 has 32 divisors (see below), whose sum is σ = 146088000. Its totient is φ = 14608704.

The previous prime is 51130631. The next prime is 51130643. The reversal of 51130632 is 23603115.

It is a super-2 number, since 2×51130632² = 5228683057438848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51130599 and 51130608.

It is not an unprimeable number, because it can be changed into a prime (51130631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152007 + ... + 152342.

It is an arithmetic number, because the mean of its divisors is an integer number (4565250).

Almost surely, 2^51130632 is an apocalyptic number.

It is an amenable number.

51130632 is an abundant number, since it is smaller than the sum of its proper divisors (94957368).

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

51130632 is a wasteful number, since it uses less digits than its factorization.

51130632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304365 (or 304361 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 51130632 is about 7150.5686487160. The cubic root of 51130632 is about 371.1593341611.

Adding to 51130632 its reverse (23603115), we get a palindrome (74733747).

The spelling of 51130632 in words is "fifty-one million, one hundred thirty thousand, six hundred thirty-two".