31214461 has 2 divisors, whose sum is σ = 31214462. Its totient is φ = 31214460.

The previous prime is 31214437. The next prime is 31214483. The reversal of 31214461 is 16441213.

It is an a-pointer prime, because the next prime (31214483) can be obtained adding 31214461 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 799236 = 5515^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 31214461 - 2⁷ = 31214333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31218461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15607230 + 15607231.

It is an arithmetic number, because the mean of its divisors is an integer number (15607231).

Almost surely, 2^31214461 is an apocalyptic number.

It is an amenable number.

31214461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31214461 is an equidigital number, since it uses as much as digits as its factorization.

31214461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 31214461 is about 5586.9903346972. The cubic root of 31214461 is about 314.8608136234.

Adding to 31214461 its reverse (16441213), we get a palindrome (47655674).

The spelling of 31214461 in words is "thirty-one million, two hundred fourteen thousand, four hundred sixty-one".