51513033 has 16 divisors (see below), whose sum is σ = 80692416. Its totient is φ = 28818240.

The previous prime is 51513029. The next prime is 51513061. The reversal of 51513033 is 33031515.

It is a happy number.

It is not a de Polignac number, because 51513033 - 2² = 51513029 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51513013) 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, 59610 + ... + 60467.

It is an arithmetic number, because the mean of its divisors is an integer number (5043276).

Almost surely, 2^51513033 is an apocalyptic number.

It is an amenable number.

51513033 is a deficient number, since it is larger than the sum of its proper divisors (29179383).

51513033 is a wasteful number, since it uses less digits than its factorization.

51513033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120104.

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 51513033 is about 7177.2580418987. The cubic root of 51513033 is about 372.0823251143.

Adding to 51513033 its reverse (33031515), we get a palindrome (84544548).

The spelling of 51513033 in words is "fifty-one million, five hundred thirteen thousand, thirty-three".