221690674 has 8 divisors (see below), whose sum is σ = 344002860. Its totient is φ = 107023056.

The previous prime is 221690633. The next prime is 221690713. The reversal of 221690674 is 476096122.

It can be written as a sum of positive squares in 2 ways, for example, as 221563225 + 127449 = 14885^2 + 357^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911069 + ... + 1911184.

Almost surely, 2^221690674 is an apocalyptic number.

221690674 is a deficient number, since it is larger than the sum of its proper divisors (122312186).

221690674 is a wasteful number, since it uses less digits than its factorization.

221690674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822284.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 221690674 is about 14889.2805064583. The cubic root of 221690674 is about 605.2235350928.

The spelling of 221690674 in words is "two hundred twenty-one million, six hundred ninety thousand, six hundred seventy-four".