31555345441 has 2 divisors, whose sum is σ = 31555345442. Its totient is φ = 31555345440.

The previous prime is 31555345421. The next prime is 31555345457. The reversal of 31555345441 is 14454355513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30800250000 + 755095441 = 175500^2 + 27479^2 .

It is a cyclic number.

It is not a de Polignac number, because 31555345441 - 2¹³ = 31555337249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31555345394 and 31555345403.

It is not a weakly prime, because it can be changed into another prime (31555345421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777672720 + 15777672721.

It is an arithmetic number, because the mean of its divisors is an integer number (15777672721).

Almost surely, 2^31555345441 is an apocalyptic number.

It is an amenable number.

31555345441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31555345441 is an equidigital number, since it uses as much as digits as its factorization.

31555345441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360000, while the sum is 40.

It can be divided in two parts, 31555 and 345441, that added together give a square (376996 = 614²).

The spelling of 31555345441 in words is "thirty-one billion, five hundred fifty-five million, three hundred forty-five thousand, four hundred forty-one".