31797228133 has 8 divisors (see below), whose sum is σ = 34734580416. Its totient is φ = 28867658400.

The previous prime is 31797228119. The next prime is 31797228139. The reversal of 31797228133 is 33182279713.

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 31797228133 - 2⁹ = 31797227621 is a prime.

It is a super-2 number, since 2×31797228133² (a number of 22 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 (31797228139) 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, 1937088 + ... + 1953433.

It is an arithmetic number, because the mean of its divisors is an integer number (4341822552).

Almost surely, 2^31797228133 is an apocalyptic number.

It is an amenable number.

31797228133 is a deficient number, since it is larger than the sum of its proper divisors (2937352283).

31797228133 is a wasteful number, since it uses less digits than its factorization.

31797228133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891275.

The product of its digits is 381024, while the sum is 46.

The spelling of 31797228133 in words is "thirty-one billion, seven hundred ninety-seven million, two hundred twenty-eight thousand, one hundred thirty-three".