51413691 has 12 divisors (see below), whose sum is σ = 79743912. Its totient is φ = 29379168.

The previous prime is 51413689. The next prime is 51413699. The reversal of 51413691 is 19631415.

It is not a de Polignac number, because 51413691 - 2¹ = 51413689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51413699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174730 + ... + 175023.

It is an arithmetic number, because the mean of its divisors is an integer number (6645326).

Almost surely, 2^51413691 is an apocalyptic number.

51413691 is a deficient number, since it is larger than the sum of its proper divisors (28330221).

51413691 is a wasteful number, since it uses less digits than its factorization.

51413691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349770 (or 349763 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 51413691 is about 7170.3340926347. The cubic root of 51413691 is about 371.8429864021.

The spelling of 51413691 in words is "fifty-one million, four hundred thirteen thousand, six hundred ninety-one".