56221667 has 4 divisors (see below), whose sum is σ = 56339520. Its totient is φ = 56103816.

The previous prime is 56221661. The next prime is 56221673. The reversal of 56221667 is 76612265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76612265 = 5 ⋅15322453.

It is an interprime number because it is at equal distance from previous prime (56221661) and next prime (56221673).

It is a cyclic number.

It is not a de Polignac number, because 56221667 - 2⁴ = 56221651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56221661) 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, 58208 + ... + 59165.

It is an arithmetic number, because the mean of its divisors is an integer number (14084880).

Almost surely, 2^56221667 is an apocalyptic number.

56221667 is a deficient number, since it is larger than the sum of its proper divisors (117853).

56221667 is a wasteful number, since it uses less digits than its factorization.

56221667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117852.

The product of its digits is 30240, while the sum is 35.

The square root of 56221667 is about 7498.1108954189. The cubic root of 56221667 is about 383.0903739995.

The spelling of 56221667 in words is "fifty-six million, two hundred twenty-one thousand, six hundred sixty-seven".