31541423393 has 2 divisors, whose sum is σ = 31541423394. Its totient is φ = 31541423392.

The previous prime is 31541423383. The next prime is 31541423429. The reversal of 31541423393 is 39332414513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28108869649 + 3432553744 = 167657^2 + 58588^2 .

It is a cyclic number.

It is not a de Polignac number, because 31541423393 - 2¹⁶ = 31541357857 is a prime.

It is a super-2 number, since 2×31541423393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31541423383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770711696 + 15770711697.

It is an arithmetic number, because the mean of its divisors is an integer number (15770711697).

Almost surely, 2^31541423393 is an apocalyptic number.

It is an amenable number.

31541423393 is a deficient number, since it is larger than the sum of its proper divisors (1).

31541423393 is an equidigital number, since it uses as much as digits as its factorization.

31541423393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 38.

The spelling of 31541423393 in words is "thirty-one billion, five hundred forty-one million, four hundred twenty-three thousand, three hundred ninety-three".