31306288949 has 8 divisors (see below), whose sum is σ = 33721920792. Its totient is φ = 28891722240.

The previous prime is 31306288939. The next prime is 31306288997. The reversal of 31306288949 is 94988260313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 771172900 + 30535116049 = 27770^2 + 174743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31306288949 - 2¹⁶ = 31306223413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31306288949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31306288939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204704 + ... + 323289.

It is an arithmetic number, because the mean of its divisors is an integer number (4215240099).

Almost surely, 2^31306288949 is an apocalyptic number.

It is an amenable number.

31306288949 is a deficient number, since it is larger than the sum of its proper divisors (2415631843).

31306288949 is a wasteful number, since it uses less digits than its factorization.

31306288949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532567.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 31306288949 in words is "thirty-one billion, three hundred six million, two hundred eighty-eight thousand, nine hundred forty-nine".