51013345 has 16 divisors (see below), whose sum is σ = 65031120. Its totient is φ = 38283264.

The previous prime is 51013301. The next prime is 51013357. The reversal of 51013345 is 54331015.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8346321 + 42667024 = 2889^2 + 6532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51013345 is a prime.

It is a super-2 number, since 2×51013345² = 5204722736178050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30901 + ... + 32509.

It is an arithmetic number, because the mean of its divisors is an integer number (4064445).

Almost surely, 2^51013345 is an apocalyptic number.

It is an amenable number.

51013345 is a deficient number, since it is larger than the sum of its proper divisors (14017775).

51013345 is a wasteful number, since it uses less digits than its factorization.

51013345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51013345 is about 7142.3627043157. The cubic root of 51013345 is about 370.8753198543.

The spelling of 51013345 in words is "fifty-one million, thirteen thousand, three hundred forty-five".