31230220302 has 32 divisors (see below), whose sum is σ = 70087635360. Its totient is φ = 10307001600.

The previous prime is 31230220261. The next prime is 31230220327. The reversal of 31230220302 is 20302203213.

It is a happy number.

31230220302 is a `hidden beast` number, since 312 + 30 + 2 + 20 + 302 = 666.

It is a super-2 number, since 2×31230220302² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857603 + ... + 2868510.

It is an arithmetic number, because the mean of its divisors is an integer number (2190238605).

Almost surely, 2^31230220302 is an apocalyptic number.

31230220302 is an abundant number, since it is smaller than the sum of its proper divisors (38857415058).

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

31230220302 is a wasteful number, since it uses less digits than its factorization.

31230220302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726225 (or 5726219 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 31230220302 its reverse (20302203213), we get a palindrome (51532423515).

The spelling of 31230220302 in words is "thirty-one billion, two hundred thirty million, two hundred twenty thousand, three hundred two".