51997199192 has 32 divisors (see below), whose sum is σ = 103240293120. Its totient is φ = 24466767360.

The previous prime is 51997199183. The next prime is 51997199197. The reversal of 51997199192 is 29199179915.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51997199197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2627318 + ... + 2647034.

It is an arithmetic number, because the mean of its divisors is an integer number (3226259160).

Almost surely, 2^51997199192 is an apocalyptic number.

It is an amenable number.

51997199192 is a deficient number, since it is larger than the sum of its proper divisors (51243093928).

51997199192 is a wasteful number, since it uses less digits than its factorization.

51997199192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39131 (or 39127 counting only the distinct ones).

The product of its digits is 4133430, while the sum is 62.

The spelling of 51997199192 in words is "fifty-one billion, nine hundred ninety-seven million, one hundred ninety-nine thousand, one hundred ninety-two".