31213302000 has 160 divisors (see below), whose sum is σ = 101237520384. Its totient is φ = 8273440000.

The previous prime is 31213301983. The next prime is 31213302007. The reversal of 31213302000 is 20331213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213302007) 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, 986425 + ... + 1017575.

Almost surely, 2^31213302000 is an apocalyptic number.

31213302000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31213302000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50618760192).

31213302000 is an abundant number, since it is smaller than the sum of its proper divisors (70024218384).

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

31213302000 is a wasteful number, since it uses less digits than its factorization.

31213302000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31344 (or 31328 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31213302000 its reverse (20331213), we get a palindrome (31233633213).

The spelling of 31213302000 in words is "thirty-one billion, two hundred thirteen million, three hundred two thousand".