31222429 has 16 divisors (see below), whose sum is σ = 37306368. Its totient is φ = 25571952.

The previous prime is 31222427. The next prime is 31222439. The reversal of 31222429 is 92422213.

It is not a de Polignac number, because 31222429 - 2¹ = 31222427 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13044 + ... + 15250.

It is an arithmetic number, because the mean of its divisors is an integer number (2331648).

Almost surely, 2^31222429 is an apocalyptic number.

It is an amenable number.

31222429 is a deficient number, since it is larger than the sum of its proper divisors (6083939).

31222429 is a wasteful number, since it uses less digits than its factorization.

31222429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304.

The product of its digits is 1728, while the sum is 25.

The square root of 31222429 is about 5587.7033743748. The cubic root of 31222429 is about 314.8876024626.

The spelling of 31222429 in words is "thirty-one million, two hundred twenty-two thousand, four hundred twenty-nine".