31149300 has 216 divisors, whose sum is σ = 113596896. Its totient is φ = 6531840.

The previous prime is 31149289. The next prime is 31149317. The reversal of 31149300 is 394113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 191019 + ... + 191181.

Almost surely, 2^31149300 is an apocalyptic number.

31149300 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 31149300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56798448).

31149300 is an abundant number, since it is smaller than the sum of its proper divisors (82447596).

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

31149300 is a wasteful number, since it uses less digits than its factorization.

31149300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31149300 is about 5581.1557942777. The cubic root of 31149300 is about 314.6415676101.

It can be divided in two parts, 31 and 149300, that added together give a triangular number (149331 = T₅₄₆).

The spelling of 31149300 in words is "thirty-one million, one hundred forty-nine thousand, three hundred".