31534423 has 2 divisors, whose sum is σ = 31534424. Its totient is φ = 31534422.

The previous prime is 31534411. The next prime is 31534427. The reversal of 31534423 is 32443513.

It is a strong prime.

It is an emirp because it is prime and its reverse (32443513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31534423 - 2⁹ = 31533911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31534427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767211 + 15767212.

It is an arithmetic number, because the mean of its divisors is an integer number (15767212).

Almost surely, 2^31534423 is an apocalyptic number.

31534423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534423 is an equidigital number, since it uses as much as digits as its factorization.

31534423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 25.

The square root of 31534423 is about 5615.5518873927. The cubic root of 31534423 is about 315.9329792972.

Adding to 31534423 its reverse (32443513), we get a palindrome (63977936).

The spelling of 31534423 in words is "thirty-one million, five hundred thirty-four thousand, four hundred twenty-three".