31230393389056 has 117 divisors (see below), whose sum is σ = 64702468779013. Its totient is φ = 15071734415360.

The previous prime is 31230393389053. The next prime is 31230393389099. The reversal of 31230393389056 is 65098339303213.

The square root of 31230393389056 is 5588416.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16376460742656 + 14853932646400 = 4046784^2 + 3854080^2 .

It is a super-2 number, since 2×31230393389056² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230393388988 and 31230393389006.

It is not an unprimeable number, because it can be changed into a prime (31230393389051) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10372098591 + ... + 10372101601.

Almost surely, 2^{31230393389056} is an apocalyptic number.

31230393389056 is the 5588416-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31230393389056

31230393389056 is an abundant number, since it is smaller than the sum of its proper divisors (33472075389957).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31230393389056 is an frugal number, since it uses more digits than its factorization.

31230393389056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 55.

The spelling of 31230393389056 in words is "thirty-one trillion, two hundred thirty billion, three hundred ninety-three million, three hundred eighty-nine thousand, fifty-six".