51089013 has 6 divisors (see below), whose sum is σ = 73795254. Its totient is φ = 34059336.

The previous prime is 51089009. The next prime is 51089021. The reversal of 51089013 is 31098015.

It can be written as a sum of positive squares in only one way, i.e., 51022449 + 66564 = 7143^2 + 258^2 .

It is not a de Polignac number, because 51089013 - 2² = 51089009 is a prime.

It is a super-2 number, since 2×51089013² = 5220174498628338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51089053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2838270 + ... + 2838287.

It is an arithmetic number, because the mean of its divisors is an integer number (12299209).

Almost surely, 2^51089013 is an apocalyptic number.

It is an amenable number.

51089013 is a deficient number, since it is larger than the sum of its proper divisors (22706241).

51089013 is a wasteful number, since it uses less digits than its factorization.

51089013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676563 (or 5676560 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 51089013 is about 7147.6578681411. The cubic root of 51089013 is about 371.0586021547.

The spelling of 51089013 in words is "fifty-one million, eighty-nine thousand, thirteen".