31455505449 has 9 divisors (see below), whose sum is σ = 45436498653. Its totient is φ = 20969982252.

The previous prime is 31455505447. The next prime is 31455505451. The reversal of 31455505449 is 94450555413.

It is a happy number.

The square root of 31455505449 is 177357.

It is a perfect power (a square), and thus also a powerful number.

31455505449 is a `hidden beast` number, since 3 + 1 + 4 + 5 + 550 + 54 + 49 = 666.

It is an interprime number because it is at equal distance from previous prime (31455505447) and next prime (31455505451).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 31455505449 - 2¹ = 31455505447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31455505441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 502512 + ... + 561630.

Almost surely, 2^31455505449 is an apocalyptic number.

31455505449 is the 177357-th square number.

31455505449 is the 88679-th centered octagonal number.

It is an amenable number.

31455505449 is a deficient number, since it is larger than the sum of its proper divisors (13980993204).

31455505449 is an frugal number, since it uses more digits than its factorization.

31455505449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118244 (or 59122 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 31455505449 in words is "thirty-one billion, four hundred fifty-five million, five hundred five thousand, four hundred forty-nine".