31972759247 has 8 divisors (see below), whose sum is σ = 37562402640. Its totient is φ = 26830287360.

The previous prime is 31972759243. The next prime is 31972759279. The reversal of 31972759247 is 74295727913.

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 31972759247 - 2² = 31972759243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31972759192 and 31972759201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31972759243) 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, 111792722 + ... + 111793007.

It is an arithmetic number, because the mean of its divisors is an integer number (4695300330).

Almost surely, 2^31972759247 is an apocalyptic number.

31972759247 is a deficient number, since it is larger than the sum of its proper divisors (5589643393).

31972759247 is a wasteful number, since it uses less digits than its factorization.

31972759247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223585753.

The product of its digits is 6667920, while the sum is 56.

The spelling of 31972759247 in words is "thirty-one billion, nine hundred seventy-two million, seven hundred fifty-nine thousand, two hundred forty-seven".