31230022 has 4 divisors (see below), whose sum is σ = 46845036. Its totient is φ = 15615010.

The previous prime is 31229999. The next prime is 31230029. The reversal of 31230022 is 22003213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 31229984 and 31230011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7807504 + ... + 7807507.

It is an arithmetic number, because the mean of its divisors is an integer number (11711259).

Almost surely, 2^31230022 is an apocalyptic number.

31230022 is a deficient number, since it is larger than the sum of its proper divisors (15615014).

31230022 is a wasteful number, since it uses less digits than its factorization.

31230022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15615013.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31230022 is about 5588.3827714286. The cubic root of 31230022 is about 314.9131262911.

Adding to 31230022 its reverse (22003213), we get a palindrome (53233235).

The spelling of 31230022 in words is "thirty-one million, two hundred thirty thousand, twenty-two".