31323023002 has 32 divisors (see below), whose sum is σ = 51142881600. Its totient is φ = 14339939328.

The previous prime is 31323022999. The next prime is 31323023003. The reversal of 31323023002 is 20032032313.

It is a happy number.

It is a super-2 number, since 2×31323023002² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (31323023003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18874 + ... + 251002.

It is an arithmetic number, because the mean of its divisors is an integer number (1598215050).

Almost surely, 2^31323023002 is an apocalyptic number.

31323023002 is a deficient number, since it is larger than the sum of its proper divisors (19819858598).

31323023002 is a wasteful number, since it uses less digits than its factorization.

31323023002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232270.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31323023002 its reverse (20032032313), we get a palindrome (51355055315).

The spelling of 31323023002 in words is "thirty-one billion, three hundred twenty-three million, twenty-three thousand, two".