221573140 has 24 divisors (see below), whose sum is σ = 465585120. Its totient is φ = 88575648.

The previous prime is 221573101. The next prime is 221573147. The reversal of 221573140 is 41375122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221573147) 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, 57391 + ... + 61129.

It is an arithmetic number, because the mean of its divisors is an integer number (19399380).

Almost surely, 2^221573140 is an apocalyptic number.

221573140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221573140 is an abundant number, since it is smaller than the sum of its proper divisors (244011980).

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

221573140 is a wasteful number, since it uses less digits than its factorization.

221573140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711 (or 6709 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 221573140 is about 14885.3330496835. Note that the first 3 decimals coincide. The cubic root of 221573140 is about 605.1165588324.

The spelling of 221573140 in words is "two hundred twenty-one million, five hundred seventy-three thousand, one hundred forty".