31042230 has 32 divisors (see below), whose sum is σ = 75168864. Its totient is φ = 8203776.

The previous prime is 31042217. The next prime is 31042241. The reversal of 31042230 is 3224013.

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, 1189 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (2349027).

Almost surely, 2^31042230 is an apocalyptic number.

31042230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31042230 is an abundant number, since it is smaller than the sum of its proper divisors (44126634).

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

31042230 is a wasteful number, since it uses less digits than its factorization.

31042230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 31042230 is about 5571.5554381160. Note that the first 3 decimals coincide. The cubic root of 31042230 is about 314.2806462189.

Adding to 31042230 its reverse (3224013), we get a palindrome (34266243).

The spelling of 31042230 in words is "thirty-one million, forty-two thousand, two hundred thirty".