31464421 has 2 divisors, whose sum is σ = 31464422. Its totient is φ = 31464420.

The previous prime is 31464409. The next prime is 31464427. The reversal of 31464421 is 12446413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 7317025 = 4914^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 31464421 - 2⁹ = 31463909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31464427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15732210 + 15732211.

It is an arithmetic number, because the mean of its divisors is an integer number (15732211).

Almost surely, 2^31464421 is an apocalyptic number.

It is an amenable number.

31464421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31464421 is an equidigital number, since it uses as much as digits as its factorization.

31464421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 31464421 is about 5609.3155553953. The cubic root of 31464421 is about 315.6990304535.

The spelling of 31464421 in words is "thirty-one million, four hundred sixty-four thousand, four hundred twenty-one".