31542420269 has 2 divisors, whose sum is σ = 31542420270. Its totient is φ = 31542420268.

The previous prime is 31542420257. The next prime is 31542420341. The reversal of 31542420269 is 96202424513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29157270025 + 2385150244 = 170755^2 + 48838^2 .

It is a cyclic number.

It is not a de Polignac number, because 31542420269 - 2⁴ = 31542420253 is a prime.

It is a super-2 number, since 2×31542420269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31542420209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771210134 + 15771210135.

It is an arithmetic number, because the mean of its divisors is an integer number (15771210135).

Almost surely, 2^31542420269 is an apocalyptic number.

It is an amenable number.

31542420269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542420269 is an equidigital number, since it uses as much as digits as its factorization.

31542420269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 31542420269 in words is "thirty-one billion, five hundred forty-two million, four hundred twenty thousand, two hundred sixty-nine".