6437224921 has 8 divisors (see below), whose sum is σ = 6480705024. Its totient is φ = 6393849600.

The previous prime is 6437224867. The next prime is 6437224931. The reversal of 6437224921 is 1294227346.

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 6437224921 - 2²⁵ = 6403670489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6437224931) 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, 99096 + ... + 150646.

It is an arithmetic number, because the mean of its divisors is an integer number (810088128).

Almost surely, 2^6437224921 is an apocalyptic number.

It is an amenable number.

6437224921 is a deficient number, since it is larger than the sum of its proper divisors (43480103).

6437224921 is a wasteful number, since it uses less digits than its factorization.

6437224921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52391.

The product of its digits is 145152, while the sum is 40.

The square root of 6437224921 is about 80232.3184321630. The cubic root of 6437224921 is about 1860.2282181333.

The spelling of 6437224921 in words is "six billion, four hundred thirty-seven million, two hundred twenty-four thousand, nine hundred twenty-one".