31450917945 has 16 divisors (see below), whose sum is σ = 52509359232. Its totient is φ = 16044526080.

The previous prime is 31450917943. The next prime is 31450917947. The reversal of 31450917945 is 54971905413.

It is an interprime number because it is at equal distance from previous prime (31450917943) and next prime (31450917947).

It is not a de Polignac number, because 31450917945 - 2¹ = 31450917943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31450917894 and 31450917903.

It is not an unprimeable number, because it can be changed into a prime (31450917941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45580696 + ... + 45581385.

It is an arithmetic number, because the mean of its divisors is an integer number (3281834952).

Almost surely, 2^31450917945 is an apocalyptic number.

It is an amenable number.

31450917945 is a deficient number, since it is larger than the sum of its proper divisors (21058441287).

31450917945 is a wasteful number, since it uses less digits than its factorization.

31450917945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91162112.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 31450917945 in words is "thirty-one billion, four hundred fifty million, nine hundred seventeen thousand, nine hundred forty-five".