7997432251 has 8 divisors (see below), whose sum is σ = 8170191360. Its totient is φ = 7824781608.

The previous prime is 7997432249. The next prime is 7997432257. The reversal of 7997432251 is 1522347997.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7997432251 - 2¹ = 7997432249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7997432195 and 7997432204.

It is not an unprimeable number, because it can be changed into a prime (7997432257) 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, 131890 + ... + 182728.

It is an arithmetic number, because the mean of its divisors is an integer number (1021273920).

Almost surely, 2^7997432251 is an apocalyptic number.

7997432251 is a deficient number, since it is larger than the sum of its proper divisors (172759109).

7997432251 is a wasteful number, since it uses less digits than its factorization.

7997432251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54233.

The product of its digits is 952560, while the sum is 49.

The square root of 7997432251 is about 89428.3637947156. The cubic root of 7997432251 is about 1999.7859980191.

It can be divided in two parts, 79974 and 32251, that added together give a square (112225 = 335²).

The spelling of 7997432251 in words is "seven billion, nine hundred ninety-seven million, four hundred thirty-two thousand, two hundred fifty-one".