31225363849 has 9 divisors (see below), whose sum is σ = 31620958183. Its totient is φ = 30834664672.

The previous prime is 31225363817. The next prime is 31225363867. The reversal of 31225363849 is 94836352213.

The square root of 31225363849 is 176707.

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

It can be written as a sum of positive squares in only one way, i.e., 7901965449 + 23323398400 = 88893^2 + 152720^2 .

It is not a de Polignac number, because 31225363849 - 2⁵ = 31225363817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31225363799 and 31225363808.

It is not an unprimeable number, because it can be changed into a prime (31225363049) 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, 14665617 + ... + 14667745.

Almost surely, 2^31225363849 is an apocalyptic number.

31225363849 is the 176707-th square number.

31225363849 is the 88354-th centered octagonal number.

It is an amenable number.

31225363849 is a deficient number, since it is larger than the sum of its proper divisors (395594334).

31225363849 is an frugal number, since it uses more digits than its factorization.

31225363849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424 (or 2212 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The spelling of 31225363849 in words is "thirty-one billion, two hundred twenty-five million, three hundred sixty-three thousand, eight hundred forty-nine".