51513230 has 16 divisors (see below), whose sum is σ = 98178480. Its totient is φ = 19393152.

The previous prime is 51513229. The next prime is 51513257. The reversal of 51513230 is 3231515.

It is a super-2 number, since 2×51513230² = 5307225730065800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151340 + ... + 151679.

It is an arithmetic number, because the mean of its divisors is an integer number (6136155).

Almost surely, 2^51513230 is an apocalyptic number.

51513230 is a deficient number, since it is larger than the sum of its proper divisors (46665250).

51513230 is a wasteful number, since it uses less digits than its factorization.

51513230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303043.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 51513230 is about 7177.2717657896. The cubic root of 51513230 is about 372.0827994287.

Adding to 51513230 its reverse (3231515), we get a palindrome (54744745).

The spelling of 51513230 in words is "fifty-one million, five hundred thirteen thousand, two hundred thirty".