31354121 has 2 divisors, whose sum is σ = 31354122. Its totient is φ = 31354120.

The previous prime is 31354117. The next prime is 31354151. The reversal of 31354121 is 12145313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26666896 + 4687225 = 5164^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 31354121 - 2² = 31354117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31354093 and 31354102.

It is not a weakly prime, because it can be changed into another prime (31354151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677060 + 15677061.

It is an arithmetic number, because the mean of its divisors is an integer number (15677061).

Almost surely, 2^31354121 is an apocalyptic number.

It is an amenable number.

31354121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31354121 is an equidigital number, since it uses as much as digits as its factorization.

31354121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 20.

The square root of 31354121 is about 5599.4750646824. The cubic root of 31354121 is about 315.3296993067.

Adding to 31354121 its reverse (12145313), we get a palindrome (43499434).

The spelling of 31354121 in words is "thirty-one million, three hundred fifty-four thousand, one hundred twenty-one".