51914509 has 4 divisors (see below), whose sum is σ = 52102204. Its totient is φ = 51726816.

The previous prime is 51914483. The next prime is 51914531. The reversal of 51914509 is 90541915.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 31393609 = 4530^2 + 5603^2 .

It is a cyclic number.

It is not a de Polignac number, because 51914509 - 2¹⁷ = 51783437 is a prime.

It is a super-2 number, since 2×51914509² = 5390232489422162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51914539) 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 3 ways as a sum of consecutive naturals, for example, 93432 + ... + 93985.

It is an arithmetic number, because the mean of its divisors is an integer number (13025551).

Almost surely, 2^51914509 is an apocalyptic number.

It is an amenable number.

51914509 is a deficient number, since it is larger than the sum of its proper divisors (187695).

51914509 is a wasteful number, since it uses less digits than its factorization.

51914509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187694.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 51914509 is about 7205.1723782294. The cubic root of 51914509 is about 373.0464546933.

The spelling of 51914509 in words is "fifty-one million, nine hundred fourteen thousand, five hundred nine".