5631145217 has 4 divisors (see below), whose sum is σ = 5632440240. Its totient is φ = 5629850196.

The previous prime is 5631145211. The next prime is 5631145231. The reversal of 5631145217 is 7125411365.

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 5631145217 - 2²⁶ = 5564036353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5631145211) 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, 640967 + ... + 649692.

It is an arithmetic number, because the mean of its divisors is an integer number (1408110060).

Almost surely, 2^5631145217 is an apocalyptic number.

It is an amenable number.

5631145217 is a deficient number, since it is larger than the sum of its proper divisors (1295023).

5631145217 is a wasteful number, since it uses less digits than its factorization.

5631145217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295022.

The product of its digits is 25200, while the sum is 35.

The square root of 5631145217 is about 75040.9569301991. The cubic root of 5631145217 is about 1779.0940574670.

The spelling of 5631145217 in words is "five billion, six hundred thirty-one million, one hundred forty-five thousand, two hundred seventeen".