51913398 has 16 divisors (see below), whose sum is σ = 104066496. Its totient is φ = 17264520.

The previous prime is 51913397. The next prime is 51913403. The reversal of 51913398 is 89331915.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51913397) 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 7 ways as a sum of consecutive naturals, for example, 7108 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (6504156).

Almost surely, 2^51913398 is an apocalyptic number.

51913398 is an abundant number, since it is smaller than the sum of its proper divisors (52153098).

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

51913398 is a wasteful number, since it uses less digits than its factorization.

51913398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19979.

The product of its digits is 29160, while the sum is 39.

The square root of 51913398 is about 7205.0952804248. The cubic root of 51913398 is about 373.0437935389.

The spelling of 51913398 in words is "fifty-one million, nine hundred thirteen thousand, three hundred ninety-eight".