31543349 has 2 divisors, whose sum is σ = 31543350. Its totient is φ = 31543348.

The previous prime is 31543331. The next prime is 31543361. The reversal of 31543349 is 94334513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 3928324 = 5255^2 + 1982^2 .

It is a cyclic number.

It is not a de Polignac number, because 31543349 - 2²⁰ = 30494773 is a prime.

It is a super-2 number, since 2×31543349² = 1989965732271602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31546349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771674 + 15771675.

It is an arithmetic number, because the mean of its divisors is an integer number (15771675).

Almost surely, 2^31543349 is an apocalyptic number.

It is an amenable number.

31543349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31543349 is an equidigital number, since it uses as much as digits as its factorization.

31543349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 31543349 is about 5616.3465883081. The cubic root of 31543349 is about 315.9627853681.

The spelling of 31543349 in words is "thirty-one million, five hundred forty-three thousand, three hundred forty-nine".