31045223 has 8 divisors (see below), whose sum is σ = 34058880. Its totient is φ = 28063480.

The previous prime is 31045219. The next prime is 31045249. The reversal of 31045223 is 32254013.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31045223 - 2² = 31045219 is a prime.

It is a super-2 number, since 2×31045223² = 1927611742239458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31045195 and 31045204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31045823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5915 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (4257360).

Almost surely, 2^31045223 is an apocalyptic number.

31045223 is a deficient number, since it is larger than the sum of its proper divisors (3013657).

31045223 is a wasteful number, since it uses less digits than its factorization.

31045223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15957.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31045223 is about 5571.8240280899. The cubic root of 31045223 is about 314.2907465644.

Adding to 31045223 its reverse (32254013), we get a palindrome (63299236).

The spelling of 31045223 in words is "thirty-one million, forty-five thousand, two hundred twenty-three".