51215032 has 32 divisors (see below), whose sum is σ = 110275200. Its totient is φ = 22053600.

The previous prime is 51215029. The next prime is 51215039. The reversal of 51215032 is 23051215.

It is a super-2 number, since 2×51215032² = 5245959005522048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51215039) 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, 13644 + ... + 16987.

It is an arithmetic number, because the mean of its divisors is an integer number (3446100).

Almost surely, 2^51215032 is an apocalyptic number.

It is an amenable number.

51215032 is an abundant number, since it is smaller than the sum of its proper divisors (59060168).

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

51215032 is a wasteful number, since it uses less digits than its factorization.

51215032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30667 (or 30663 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51215032 is about 7156.4678438459. The cubic root of 51215032 is about 371.3634429058.

Adding to 51215032 its reverse (23051215), we get a palindrome (74266247).

It can be divided in two parts, 5121 and 5032, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 51215032 in words is "fifty-one million, two hundred fifteen thousand, thirty-two".