807520216831 has 4 divisors (see below), whose sum is σ = 807527988664. Its totient is φ = 807512445000.

The previous prime is 807520216663. The next prime is 807520216849. The reversal of 807520216831 is 138612025708.

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 807520216831 - 2⁹ = 807520216319 is a prime.

It is a super-2 number, since 2×807520216831² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (807520216031) 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, 3727920 + ... + 3938581.

It is an arithmetic number, because the mean of its divisors is an integer number (201881997166).

Almost surely, 2^807520216831 is an apocalyptic number.

807520216831 is a deficient number, since it is larger than the sum of its proper divisors (7771833).

807520216831 is a wasteful number, since it uses less digits than its factorization.

807520216831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7771832.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 807520216831 in words is "eight hundred seven billion, five hundred twenty million, two hundred sixteen thousand, eight hundred thirty-one".