31241400 has 48 divisors (see below), whose sum is σ = 96850200. Its totient is φ = 8330880.

The previous prime is 31241389. The next prime is 31241401. The reversal of 31241400 is 414213.

31241400 = 55² + 56² + ... + 454².

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

It is a self number, because there is not a number n which added to its sum of digits gives 31241400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25435 + ... + 26634.

Almost surely, 2^31241400 is an apocalyptic number.

31241400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31241400 is an abundant number, since it is smaller than the sum of its proper divisors (65608800).

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

31241400 is a wasteful number, since it uses less digits than its factorization.

31241400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52088 (or 52079 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31241400 is about 5589.4006834365. The cubic root of 31241400 is about 314.9513656333.

Adding to 31241400 its reverse (414213), we get a palindrome (31655613).

The spelling of 31241400 in words is "thirty-one million, two hundred forty-one thousand, four hundred".