31201242397 has 8 divisors (see below), whose sum is σ = 34152180440. Its totient is φ = 28328996160.

The previous prime is 31201242379. The next prime is 31201242439. The reversal of 31201242397 is 79324210213.

It can be written as a sum of positive squares in 4 ways, for example, as 2811014361 + 28390228036 = 53019^2 + 168494^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201242397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201242197) 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, 19672122 + ... + 19673707.

It is an arithmetic number, because the mean of its divisors is an integer number (4269022555).

Almost surely, 2^31201242397 is an apocalyptic number.

It is an amenable number.

31201242397 is a deficient number, since it is larger than the sum of its proper divisors (2950938043).

31201242397 is a wasteful number, since it uses less digits than its factorization.

31201242397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39345903.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 31201242397 in words is "thirty-one billion, two hundred one million, two hundred forty-two thousand, three hundred ninety-seven".