31421022 has 16 divisors (see below), whose sum is σ = 66149760. Its totient is φ = 9922392.

The previous prime is 31421009. The next prime is 31421053. The reversal of 31421022 is 22012413.

It is a junction number, because it is equal to n+sod(n) for n = 31420992 and 31421010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137698 + ... + 137925.

It is an arithmetic number, because the mean of its divisors is an integer number (4134360).

Almost surely, 2^31421022 is an apocalyptic number.

31421022 is an abundant number, since it is smaller than the sum of its proper divisors (34728738).

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

31421022 is a wasteful number, since it uses less digits than its factorization.

31421022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275647.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31421022 is about 5605.4457449876. The cubic root of 31421022 is about 315.5538153618.

Adding to 31421022 its reverse (22012413), we get a palindrome (53433435).

The spelling of 31421022 in words is "thirty-one million, four hundred twenty-one thousand, twenty-two".