221277142 has 4 divisors (see below), whose sum is σ = 331915716. Its totient is φ = 110638570.

The previous prime is 221277139. The next prime is 221277143. The reversal of 221277142 is 241772122.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221277142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221277143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55319284 + ... + 55319287.

It is an arithmetic number, because the mean of its divisors is an integer number (82978929).

Almost surely, 2^221277142 is an apocalyptic number.

221277142 is a deficient number, since it is larger than the sum of its proper divisors (110638574).

221277142 is a wasteful number, since it uses less digits than its factorization.

221277142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110638573.

The product of its digits is 3136, while the sum is 28.

The square root of 221277142 is about 14875.3871210130. The cubic root of 221277142 is about 604.8469817691.

The spelling of 221277142 in words is "two hundred twenty-one million, two hundred seventy-seven thousand, one hundred forty-two".