22631971 has 4 divisors (see below), whose sum is σ = 22942072. Its totient is φ = 22321872.

The previous prime is 22631969. The next prime is 22631993. The reversal of 22631971 is 17913622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22631971 - 2¹ = 22631969 is a prime.

It is a super-2 number, since 2×22631971² = 1024412222689682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22631911) 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, 154941 + ... + 155086.

It is an arithmetic number, because the mean of its divisors is an integer number (5735518).

Almost surely, 2^22631971 is an apocalyptic number.

22631971 is a deficient number, since it is larger than the sum of its proper divisors (310101).

22631971 is an equidigital number, since it uses as much as digits as its factorization.

22631971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310100.

The product of its digits is 4536, while the sum is 31.

The square root of 22631971 is about 4757.3071164263. The cubic root of 22631971 is about 282.8616862102.

The spelling of 22631971 in words is "twenty-two million, six hundred thirty-one thousand, nine hundred seventy-one".