221734542 has 16 divisors (see below), whose sum is σ = 444789072. Its totient is φ = 73691520.

The previous prime is 221734501. The next prime is 221734543. The reversal of 221734542 is 245437122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221734543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52809 + ... + 56852.

It is an arithmetic number, because the mean of its divisors is an integer number (27799317).

Almost surely, 2^221734542 is an apocalyptic number.

221734542 is an abundant number, since it is smaller than the sum of its proper divisors (223054530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221734542 is a wasteful number, since it uses less digits than its factorization.

221734542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110003.

The product of its digits is 13440, while the sum is 30.

The square root of 221734542 is about 14890.7535739465. The cubic root of 221734542 is about 605.2634528673.

The spelling of 221734542 in words is "two hundred twenty-one million, seven hundred thirty-four thousand, five hundred forty-two".