51534340199 has 4 divisors (see below), whose sum is σ = 51537952536. Its totient is φ = 51530727864.

The previous prime is 51534340183. The next prime is 51534340213. The reversal of 51534340199 is 99104343515.

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 51534340199 - 2⁴ = 51534340183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534340159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784684 + ... + 1813329.

It is an arithmetic number, because the mean of its divisors is an integer number (12884488134).

Almost surely, 2^51534340199 is an apocalyptic number.

51534340199 is a deficient number, since it is larger than the sum of its proper divisors (3612337).

51534340199 is a wasteful number, since it uses less digits than its factorization.

51534340199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612336.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 51534340199 in words is "fifty-one billion, five hundred thirty-four million, three hundred forty thousand, one hundred ninety-nine".