31422661 has 4 divisors (see below), whose sum is σ = 31441824. Its totient is φ = 31403500.

The previous prime is 31422659. The next prime is 31422673. The reversal of 31422661 is 16622413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31422661 - 2¹ = 31422659 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 (31422641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6865 + ... + 10486.

It is an arithmetic number, because the mean of its divisors is an integer number (7860456).

Almost surely, 2^31422661 is an apocalyptic number.

It is an amenable number.

31422661 is a deficient number, since it is larger than the sum of its proper divisors (19163).

31422661 is a wasteful number, since it uses less digits than its factorization.

31422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19162.

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

The square root of 31422661 is about 5605.5919401969. The cubic root of 31422661 is about 315.5593019615.

The spelling of 31422661 in words is "thirty-one million, four hundred twenty-two thousand, six hundred sixty-one".