53198731 has 4 divisors (see below), whose sum is σ = 55033200. Its totient is φ = 51364264.

The previous prime is 53198723. The next prime is 53198753. The reversal of 53198731 is 13789135.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53198731 - 2³ = 53198723 is a prime.

It is a super-2 number, since 2×53198731² = 5660209960020722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53198791) 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 3 ways as a sum of consecutive naturals, for example, 917191 + ... + 917248.

It is an arithmetic number, because the mean of its divisors is an integer number (13758300).

Almost surely, 2^53198731 is an apocalyptic number.

53198731 is a deficient number, since it is larger than the sum of its proper divisors (1834469).

53198731 is a wasteful number, since it uses less digits than its factorization.

53198731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834468.

The product of its digits is 22680, while the sum is 37.

The square root of 53198731 is about 7293.7460197076. The cubic root of 53198731 is about 376.0974806669.

The spelling of 53198731 in words is "fifty-three million, one hundred ninety-eight thousand, seven hundred thirty-one".