51898619 has 8 divisors (see below), whose sum is σ = 53720448. Its totient is φ = 50086080.

The previous prime is 51898601. The next prime is 51898621. The reversal of 51898619 is 91689815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51898619 is a prime.

It is a super-2 number, since 2×51898619² = 5386933308214322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51898699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10199 + ... + 14415.

It is an arithmetic number, because the mean of its divisors is an integer number (6715056).

Almost surely, 2^51898619 is an apocalyptic number.

51898619 is a deficient number, since it is larger than the sum of its proper divisors (1821829).

51898619 is a wasteful number, since it uses less digits than its factorization.

51898619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645.

The product of its digits is 155520, while the sum is 47.

The square root of 51898619 is about 7204.0696137669. The cubic root of 51898619 is about 373.0083901061.

The spelling of 51898619 in words is "fifty-one million, eight hundred ninety-eight thousand, six hundred nineteen".