31430022 has 16 divisors (see below), whose sum is σ = 67695600. Its totient is φ = 9670752.

The previous prime is 31430017. The next prime is 31430023. The reversal of 31430022 is 22003413.

It is a junction number, because it is equal to n+sod(n) for n = 31429983 and 31430010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201397 + ... + 201552.

It is an arithmetic number, because the mean of its divisors is an integer number (4230975).

Almost surely, 2^31430022 is an apocalyptic number.

31430022 is an abundant number, since it is smaller than the sum of its proper divisors (36265578).

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

31430022 is a wasteful number, since it uses less digits than its factorization.

31430022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402967.

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

The square root of 31430022 is about 5606.2484782607. The cubic root of 31430022 is about 315.5839407688.

Adding to 31430022 its reverse (22003413), we get a palindrome (53433435).

The spelling of 31430022 in words is "thirty-one million, four hundred thirty thousand, twenty-two".