31323000 has 128 divisors (see below), whose sum is σ = 100077120. Its totient is φ = 8153600.

The previous prime is 31322983. The next prime is 31323023. The reversal of 31323000 is 32313.

It is a happy number.

It is a super-2 number, since 2×31323000² = 1962260658000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158902 + ... + 159098.

Almost surely, 2^31323000 is an apocalyptic number.

31323000 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 31323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50038560).

31323000 is an abundant number, since it is smaller than the sum of its proper divisors (68754120).

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

31323000 is a wasteful number, since it uses less digits than its factorization.

31323000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 31323000 is about 5596.6954535690. The cubic root of 31323000 is about 315.2253363728.

Adding to 31323000 its reverse (32313), we get a palindrome (31355313).

The spelling of 31323000 in words is "thirty-one million, three hundred twenty-three thousand".