221071442 has 8 divisors (see below), whose sum is σ = 337043532. Its totient is φ = 108723600.

The previous prime is 221071429. The next prime is 221071457. The reversal of 221071442 is 244170122.

221071442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 173475241 + 47596201 = 13171^2 + 6899^2 .

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, 905909 + ... + 906152.

Almost surely, 2^221071442 is an apocalyptic number.

221071442 is a deficient number, since it is larger than the sum of its proper divisors (115972090).

221071442 is a wasteful number, since it uses less digits than its factorization.

221071442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812124.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 221071442 is about 14868.4714076464. The cubic root of 221071442 is about 604.6595010443.

The spelling of 221071442 in words is "two hundred twenty-one million, seventy-one thousand, four hundred forty-two".