31421966 has 8 divisors (see below), whose sum is σ = 47158464. Its totient is φ = 15702480.

The previous prime is 31421963. The next prime is 31421969. The reversal of 31421966 is 66912413.

It is an interprime number because it is at equal distance from previous prime (31421963) and next prime (31421969).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421963) 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, 2531 + ... + 8321.

It is an arithmetic number, because the mean of its divisors is an integer number (5894808).

Almost surely, 2^31421966 is an apocalyptic number.

31421966 is a deficient number, since it is larger than the sum of its proper divisors (15736498).

31421966 is a wasteful number, since it uses less digits than its factorization.

31421966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8506.

The product of its digits is 7776, while the sum is 32.

The square root of 31421966 is about 5605.5299481851. The cubic root of 31421966 is about 315.5569754523.

The spelling of 31421966 in words is "thirty-one million, four hundred twenty-one thousand, nine hundred sixty-six".