51151009 has 16 divisors (see below), whose sum is σ = 63132160. Its totient is φ = 40357440.

The previous prime is 51151007. The next prime is 51151013. The reversal of 51151009 is 90015115.

It is a cyclic number.

It is not a de Polignac number, because 51151009 - 2¹ = 51151007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51151007) 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, 48712 + ... + 49750.

It is an arithmetic number, because the mean of its divisors is an integer number (3945760).

Almost surely, 2^51151009 is an apocalyptic number.

It is an amenable number.

51151009 is a deficient number, since it is larger than the sum of its proper divisors (11981151).

51151009 is a wasteful number, since it uses less digits than its factorization.

51151009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 51151009 is about 7151.9933584980. The cubic root of 51151009 is about 371.2086334361.

The spelling of 51151009 in words is "fifty-one million, one hundred fifty-one thousand, nine".