31526488249 has 9 divisors (see below), whose sum is σ = 31690151661. Its totient is φ = 31363668480.

The previous prime is 31526488247. The next prime is 31526488261. The reversal of 31526488249 is 94288462513.

It is a happy number.

The square root of 31526488249 is 177557.

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

It can be written as a sum of positive squares in 4 ways, for example, as 385533225 + 31140955024 = 19635^2 + 176468^2 .

It is not a de Polignac number, because 31526488249 - 2¹ = 31526488247 is a prime.

It is a super-2 number, since 2×31526488249² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31526488196 and 31526488205.

It is not an unprimeable number, because it can be changed into a prime (31526488241) 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, 49182969 + ... + 49183609.

Almost surely, 2^31526488249 is an apocalyptic number.

31526488249 is the 177557-th square number.

31526488249 is the 88779-th centered octagonal number.

It is an amenable number.

31526488249 is a deficient number, since it is larger than the sum of its proper divisors (163663412).

31526488249 is an frugal number, since it uses more digits than its factorization.

31526488249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 918 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 31526488249 in words is "thirty-one billion, five hundred twenty-six million, four hundred eighty-eight thousand, two hundred forty-nine".