50430640251 has 4 divisors (see below), whose sum is σ = 67240853672. Its totient is φ = 33620426832.

The previous prime is 50430640187. The next prime is 50430640261. The reversal of 50430640251 is 15204603405.

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

It is not a de Polignac number, because 50430640251 - 2⁶ = 50430640187 is a prime.

It is a super-2 number, since 2×50430640251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50430640261) 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, 8405106706 + ... + 8405106711.

It is an arithmetic number, because the mean of its divisors is an integer number (16810213418).

Almost surely, 2^50430640251 is an apocalyptic number.

50430640251 is a deficient number, since it is larger than the sum of its proper divisors (16810213421).

50430640251 is a wasteful number, since it uses less digits than its factorization.

50430640251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16810213420.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 50430640251 in words is "fifty billion, four hundred thirty million, six hundred forty thousand, two hundred fifty-one".