51649060 has 24 divisors (see below), whose sum is σ = 114843960. Its totient is φ = 19444224.

The previous prime is 51649051. The next prime is 51649079. The reversal of 51649060 is 6094615.

It can be written as a sum of positive squares in 4 ways, for example, as 17239104 + 34409956 = 4152^2 + 5866^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75615 + ... + 76294.

It is an arithmetic number, because the mean of its divisors is an integer number (4785165).

Almost surely, 2^51649060 is an apocalyptic number.

It is an amenable number.

51649060 is an abundant number, since it is smaller than the sum of its proper divisors (63194900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51649060 is a wasteful number, since it uses less digits than its factorization.

51649060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151935 (or 151933 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 51649060 is about 7186.7280455017. The cubic root of 51649060 is about 372.4095481774.

The spelling of 51649060 in words is "fifty-one million, six hundred forty-nine thousand, sixty".