51207013 has 16 divisors (see below), whose sum is σ = 60371136. Its totient is φ = 42819840.

The previous prime is 51206989. The next prime is 51207029. The reversal of 51207013 is 31070215.

It is a cyclic number.

It is not a de Polignac number, because 51207013 - 2¹³ = 51198821 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 (51207053) 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, 61506 + ... + 62332.

It is an arithmetic number, because the mean of its divisors is an integer number (3773196).

Almost surely, 2^51207013 is an apocalyptic number.

It is an amenable number.

51207013 is a deficient number, since it is larger than the sum of its proper divisors (9164123).

51207013 is a wasteful number, since it uses less digits than its factorization.

51207013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 51207013 is about 7155.9075594924. The cubic root of 51207013 is about 371.3440598017.

Adding to 51207013 its reverse (31070215), we get a palindrome (82277228).

The spelling of 51207013 in words is "fifty-one million, two hundred seven thousand, thirteen".