31045885478 has 8 divisors (see below), whose sum is σ = 46789534200. Its totient is φ = 15449374080.

The previous prime is 31045885471. The next prime is 31045885483. The reversal of 31045885478 is 87458854013.

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

It is a super-2 number, since 2×31045885478² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31045885471) 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, 36783803 + ... + 36784646.

It is an arithmetic number, because the mean of its divisors is an integer number (5848691775).

Almost surely, 2^31045885478 is an apocalyptic number.

31045885478 is a deficient number, since it is larger than the sum of its proper divisors (15743648722).

31045885478 is a wasteful number, since it uses less digits than its factorization.

31045885478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73568662.

The product of its (nonzero) digits is 4300800, while the sum is 53.

The spelling of 31045885478 in words is "thirty-one billion, forty-five million, eight hundred eighty-five thousand, four hundred seventy-eight".