51344013 has 32 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 28600320.

The previous prime is 51344003. The next prime is 51344017. The reversal of 51344013 is 31044315.

It is not a de Polignac number, because 51344013 - 2⁴ = 51343997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51344017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41581 + ... + 42797.

It is an arithmetic number, because the mean of its divisors is an integer number (2557800).

Almost surely, 2^51344013 is an apocalyptic number.

It is an amenable number.

51344013 is a deficient number, since it is larger than the sum of its proper divisors (30505587).

51344013 is a wasteful number, since it uses less digits than its factorization.

51344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51344013 is about 7165.4736758989. The cubic root of 51344013 is about 371.6749313674.

Adding to 51344013 its reverse (31044315), we get a palindrome (82388328).

The spelling of 51344013 in words is "fifty-one million, three hundred forty-four thousand, thirteen".