31020443429 has 2 divisors, whose sum is σ = 31020443430. Its totient is φ = 31020443428.

The previous prime is 31020443411. The next prime is 31020443437. The reversal of 31020443429 is 92434402013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15873480100 + 15146963329 = 125990^2 + 123073^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020443429 - 2¹⁶ = 31020377893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31020443395 and 31020443404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020443449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510221714 + 15510221715.

It is an arithmetic number, because the mean of its divisors is an integer number (15510221715).

Almost surely, 2^31020443429 is an apocalyptic number.

It is an amenable number.

31020443429 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020443429 is an equidigital number, since it uses as much as digits as its factorization.

31020443429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 31020443429 in words is "thirty-one billion, twenty million, four hundred forty-three thousand, four hundred twenty-nine".