31008040249 has 4 divisors (see below), whose sum is σ = 32356215936. Its totient is φ = 29659864564.

The previous prime is 31008040247. The next prime is 31008040267. The reversal of 31008040249 is 94204080013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94204080013 = 44119 ⋅2135227.

It is a cyclic number.

It is not a de Polignac number, because 31008040249 - 2¹ = 31008040247 is a prime.

It is a super-2 number, since 2×31008040249² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31008040249.

It is not an unprimeable number, because it can be changed into a prime (31008040241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674087809 + ... + 674087854.

It is an arithmetic number, because the mean of its divisors is an integer number (8089053984).

Almost surely, 2^31008040249 is an apocalyptic number.

It is an amenable number.

31008040249 is a deficient number, since it is larger than the sum of its proper divisors (1348175687).

31008040249 is a wasteful number, since it uses less digits than its factorization.

31008040249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348175686.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 31008040249 in words is "thirty-one billion, eight million, forty thousand, two hundred forty-nine".