31242252123 has 32 divisors (see below), whose sum is σ = 47108160000. Its totient is φ = 20458249056.

The previous prime is 31242252089. The next prime is 31242252187. The reversal of 31242252123 is 32125224213.

31242252123 is a `hidden beast` number, since 312 + 4 + 225 + 2 + 123 = 666.

It is not a de Polignac number, because 31242252123 - 2⁹ = 31242251611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31242253123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2093733 + ... + 2108601.

It is an arithmetic number, because the mean of its divisors is an integer number (1472130000).

Almost surely, 2^31242252123 is an apocalyptic number.

31242252123 is a deficient number, since it is larger than the sum of its proper divisors (15865907877).

31242252123 is a wasteful number, since it uses less digits than its factorization.

31242252123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16256 (or 16250 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

Adding to 31242252123 its reverse (32125224213), we get a palindrome (63367476336).

The spelling of 31242252123 in words is "thirty-one billion, two hundred forty-two million, two hundred fifty-two thousand, one hundred twenty-three".