31440659153 has 4 divisors (see below), whose sum is σ = 31871353188. Its totient is φ = 31009965120.

The previous prime is 31440659149. The next prime is 31440659207. The reversal of 31440659153 is 35195604413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18904050064 + 12536609089 = 137492^2 + 111967^2 .

It is a cyclic number.

It is not a de Polignac number, because 31440659153 - 2² = 31440659149 is a prime.

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 31440659153.

It is not an unprimeable number, because it can be changed into a prime (31440659143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215346908 + ... + 215347053.

It is an arithmetic number, because the mean of its divisors is an integer number (7967838297).

Almost surely, 2^31440659153 is an apocalyptic number.

It is an amenable number.

31440659153 is a deficient number, since it is larger than the sum of its proper divisors (430694035).

31440659153 is an equidigital number, since it uses as much as digits as its factorization.

31440659153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430694034.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 31440659153 in words is "thirty-one billion, four hundred forty million, six hundred fifty-nine thousand, one hundred fifty-three".