31455585349 has 2 divisors, whose sum is σ = 31455585350. Its totient is φ = 31455585348.

The previous prime is 31455585311. The next prime is 31455585361. The reversal of 31455585349 is 94358555413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30810780900 + 644804449 = 175530^2 + 25393^2 .

It is an emirp because it is prime and its reverse (94358555413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31455585349 - 2¹¹ = 31455583301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31455585296 and 31455585305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31455585649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15727792674 + 15727792675.

It is an arithmetic number, because the mean of its divisors is an integer number (15727792675).

Almost surely, 2^31455585349 is an apocalyptic number.

It is an amenable number.

31455585349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31455585349 is an equidigital number, since it uses as much as digits as its factorization.

31455585349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480000, while the sum is 52.

The spelling of 31455585349 in words is "thirty-one billion, four hundred fifty-five million, five hundred eighty-five thousand, three hundred forty-nine".