31422000021 has 16 divisors (see below), whose sum is σ = 42383001600. Its totient is φ = 20705727168.

The previous prime is 31422000019. The next prime is 31422000023. The reversal of 31422000021 is 12000022413.

It is an interprime number because it is at equal distance from previous prime (31422000019) and next prime (31422000023).

It is not a de Polignac number, because 31422000021 - 2¹ = 31422000019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422000023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50806 + ... + 255783.

It is an arithmetic number, because the mean of its divisors is an integer number (2648937600).

Almost surely, 2^31422000021 is an apocalyptic number.

It is an amenable number.

31422000021 is a deficient number, since it is larger than the sum of its proper divisors (10961001579).

31422000021 is a wasteful number, since it uses less digits than its factorization.

31422000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306988.

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

Adding to 31422000021 its reverse (12000022413), we get a palindrome (43422022434).

The spelling of 31422000021 in words is "thirty-one billion, four hundred twenty-two million, twenty-one", and thus it is an aban number.