221265542 has 4 divisors (see below), whose sum is σ = 331898316. Its totient is φ = 110632770.

The previous prime is 221265521. The next prime is 221265547. The reversal of 221265542 is 245562122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221265547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55316384 + ... + 55316387.

It is an arithmetic number, because the mean of its divisors is an integer number (82974579).

Almost surely, 2^221265542 is an apocalyptic number.

221265542 is a deficient number, since it is larger than the sum of its proper divisors (110632774).

221265542 is a wasteful number, since it uses less digits than its factorization.

221265542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110632773.

The product of its digits is 9600, while the sum is 29.

The square root of 221265542 is about 14874.9972100838. The cubic root of 221265542 is about 604.8364122972.

The spelling of 221265542 in words is "two hundred twenty-one million, two hundred sixty-five thousand, five hundred forty-two".