31143030 has 32 divisors (see below), whose sum is σ = 74892384. Its totient is φ = 8288256.

The previous prime is 31143029. The next prime is 31143053. The reversal of 31143030 is 3034113.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24982 + ... + 26198.

It is an arithmetic number, because the mean of its divisors is an integer number (2340387).

Almost surely, 2^31143030 is an apocalyptic number.

31143030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31143030 is an abundant number, since it is smaller than the sum of its proper divisors (43749354).

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

31143030 is a wasteful number, since it uses less digits than its factorization.

31143030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080.

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

The square root of 31143030 is about 5580.5940543996. The cubic root of 31143030 is about 314.6204549365.

Adding to 31143030 its reverse (3034113), we get a palindrome (34177143).

The spelling of 31143030 in words is "thirty-one million, one hundred forty-three thousand, thirty".