220651378 has 8 divisors (see below), whose sum is σ = 333393372. Its totient is φ = 109520256.

The previous prime is 220651363. The next prime is 220651393. The reversal of 220651378 is 873156022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220651363) and next prime (220651393).

It can be written as a sum of positive squares in 2 ways, for example, as 212488929 + 8162449 = 14577^2 + 2857^2 .

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

It is a super-2 number, since 2×220651378² = 97374061226597768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402375 + ... + 402922.

Almost surely, 2^220651378 is an apocalyptic number.

220651378 is a deficient number, since it is larger than the sum of its proper divisors (112741994).

220651378 is a wasteful number, since it uses less digits than its factorization.

220651378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805436.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 220651378 is about 14854.3386927860. The cubic root of 220651378 is about 604.2762814372.

The spelling of 220651378 in words is "two hundred twenty million, six hundred fifty-one thousand, three hundred seventy-eight".