51513053 has 4 divisors (see below), whose sum is σ = 51829248. Its totient is φ = 51196860.

The previous prime is 51513029. The next prime is 51513061. The reversal of 51513053 is 35031515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35031515 = 5 ⋅7006303.

It is a cyclic number.

It is not a de Polignac number, because 51513053 - 2¹² = 51508957 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 157853 + ... + 158178.

It is an arithmetic number, because the mean of its divisors is an integer number (12957312).

Almost surely, 2^51513053 is an apocalyptic number.

It is an amenable number.

51513053 is a deficient number, since it is larger than the sum of its proper divisors (316195).

51513053 is a wasteful number, since it uses less digits than its factorization.

51513053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316194.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 51513053 is about 7177.2594351883. The cubic root of 51513053 is about 372.0823732681.

Adding to 51513053 its reverse (35031515), we get a palindrome (86544568).

The spelling of 51513053 in words is "fifty-one million, five hundred thirteen thousand, fifty-three".