31241430 has 128 divisors (see below), whose sum is σ = 92828160. Its totient is φ = 7413120.

The previous prime is 31241411. The next prime is 31241443. The reversal of 31241430 is 3414213.

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 63 ways as a sum of consecutive naturals, for example, 198912 + ... + 199068.

It is an arithmetic number, because the mean of its divisors is an integer number (725220).

Almost surely, 2^31241430 is an apocalyptic number.

31241430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31241430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46414080).

31241430 is an abundant number, since it is smaller than the sum of its proper divisors (61586730).

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

31241430 is a wasteful number, since it uses less digits than its factorization.

31241430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31241430 is about 5589.4033670867. The cubic root of 31241430 is about 314.9514664455.

Adding to 31241430 its reverse (3414213), we get a palindrome (34655643).

It can be divided in two parts, 3124 and 1430, that added together give a palindrome (4554).

The spelling of 31241430 in words is "thirty-one million, two hundred forty-one thousand, four hundred thirty".