31150245721 has 8 divisors (see below), whose sum is σ = 36562450880. Its totient is φ = 25978583088.

The previous prime is 31150245719. The next prime is 31150245733. The reversal of 31150245721 is 12754205113.

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 31150245721 - 2¹ = 31150245719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31150245221) 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, 60135351 + ... + 60135868.

It is an arithmetic number, because the mean of its divisors is an integer number (4570306360).

Almost surely, 2^31150245721 is an apocalyptic number.

It is an amenable number.

31150245721 is a deficient number, since it is larger than the sum of its proper divisors (5412205159).

31150245721 is a wasteful number, since it uses less digits than its factorization.

31150245721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120271263.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 31150245721 in words is "thirty-one billion, one hundred fifty million, two hundred forty-five thousand, seven hundred twenty-one".