51240032 has 24 divisors (see below), whose sum is σ = 102160800. Its totient is φ = 25294464.

The previous prime is 51240019. The next prime is 51240073. The reversal of 51240032 is 23004215.

It is a super-2 number, since 2×51240032² = 5251081758722048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7607 + ... + 12662.

It is an arithmetic number, because the mean of its divisors is an integer number (4256700).

Almost surely, 2^51240032 is an apocalyptic number.

It is an amenable number.

51240032 is a deficient number, since it is larger than the sum of its proper divisors (50920768).

51240032 is a wasteful number, since it uses less digits than its factorization.

51240032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20358 (or 20350 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51240032 is about 7158.2143024640. The cubic root of 51240032 is about 371.4238586046.

Adding to 51240032 its reverse (23004215), we get a palindrome (74244247).

The spelling of 51240032 in words is "fifty-one million, two hundred forty thousand, thirty-two".