31455303661 has 4 divisors (see below), whose sum is σ = 31457836800. Its totient is φ = 31452770524.

The previous prime is 31455303641. The next prime is 31455303667. The reversal of 31455303661 is 16630355413.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 31455303661 - 2¹⁵ = 31455270893 is a prime.

It is a super-2 number, since 2×31455303661² (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 31455303661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31455303667) 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, 1247851 + ... + 1272808.

It is an arithmetic number, because the mean of its divisors is an integer number (7864459200).

Almost surely, 2^31455303661 is an apocalyptic number.

It is an amenable number.

31455303661 is a deficient number, since it is larger than the sum of its proper divisors (2533139).

31455303661 is a wasteful number, since it uses less digits than its factorization.

31455303661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533138.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 31455303661 in words is "thirty-one billion, four hundred fifty-five million, three hundred three thousand, six hundred sixty-one".