2478867221 has 8 divisors (see below), whose sum is σ = 2485546560. Its totient is φ = 2472197728.

The previous prime is 2478867211. The next prime is 2478867227. The reversal of 2478867221 is 1227688742.

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 a de Polignac number, because none of the positive numbers 2^k-2478867221 is a prime.

It is a super-2 number, since 2×2478867221² = 12289565398696525682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478867227) 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, 841970 + ... + 844908.

It is an arithmetic number, because the mean of its divisors is an integer number (310693320).

Almost surely, 2^2478867221 is an apocalyptic number.

It is an amenable number.

2478867221 is a deficient number, since it is larger than the sum of its proper divisors (6679339).

2478867221 is a wasteful number, since it uses less digits than its factorization.

2478867221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923.

The product of its digits is 602112, while the sum is 47.

The square root of 2478867221 is about 49788.2237180641. The cubic root of 2478867221 is about 1353.3737694015.

The spelling of 2478867221 in words is "two billion, four hundred seventy-eight million, eight hundred sixty-seven thousand, two hundred twenty-one".