51040015 has 16 divisors (see below), whose sum is σ = 67082400. Its totient is φ = 37049472.

The previous prime is 51039973. The next prime is 51040019. The reversal of 51040015 is 51004015.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51040015 - 2¹⁵ = 51007247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040019) 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, 2820 + ... + 10489.

It is an arithmetic number, because the mean of its divisors is an integer number (4192650).

Almost surely, 2^51040015 is an apocalyptic number.

51040015 is a deficient number, since it is larger than the sum of its proper divisors (16042385).

51040015 is a wasteful number, since it uses less digits than its factorization.

51040015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13386.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51040015 is about 7144.2294895951. The cubic root of 51040015 is about 370.9399403410.

The spelling of 51040015 in words is "fifty-one million, forty thousand, fifteen".