51060009 has 64 divisors (see below), whose sum is σ = 93542400. Its totient is φ = 24413760.

The previous prime is 51059999. The next prime is 51060019. The reversal of 51060009 is 90006015.

It is an interprime number because it is at equal distance from previous prime (51059999) and next prime (51060019).

It is not a de Polignac number, because 51060009 - 2⁸ = 51059753 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 (51060019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 146974 + ... + 147320.

It is an arithmetic number, because the mean of its divisors is an integer number (1461600).

Almost surely, 2^51060009 is an apocalyptic number.

It is an amenable number.

51060009 is a deficient number, since it is larger than the sum of its proper divisors (42482391).

51060009 is a wasteful number, since it uses less digits than its factorization.

51060009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51060009 is about 7145.6286637356. The cubic root of 51060009 is about 370.9883703486.

The spelling of 51060009 in words is "fifty-one million, sixty thousand, nine".