31443941 has 2 divisors, whose sum is σ = 31443942. Its totient is φ = 31443940.

The previous prime is 31443911. The next prime is 31443949. The reversal of 31443941 is 14934413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30580900 + 863041 = 5530^2 + 929^2 .

It is a cyclic number.

It is not a de Polignac number, because 31443941 - 2⁶ = 31443877 is a prime.

It is a super-2 number, since 2×31443941² = 1977442851222962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31443949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721970 + 15721971.

It is an arithmetic number, because the mean of its divisors is an integer number (15721971).

Almost surely, 2^31443941 is an apocalyptic number.

It is an amenable number.

31443941 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443941 is an equidigital number, since it uses as much as digits as its factorization.

31443941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 31443941 is about 5607.4897235751. The cubic root of 31443941 is about 315.6305200616.

The spelling of 31443941 in words is "thirty-one million, four hundred forty-three thousand, nine hundred forty-one".