221077430 has 32 divisors (see below), whose sum is σ = 469463040. Its totient is φ = 73352160.

The previous prime is 221077427. The next prime is 221077433. The reversal of 221077430 is 34770122.

It is an interprime number because it is at equal distance from previous prime (221077427) and next prime (221077433).

It is a self number, because there is not a number n which added to its sum of digits gives 221077430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221077433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48770 + ... + 53109.

It is an arithmetic number, because the mean of its divisors is an integer number (14670720).

Almost surely, 2^221077430 is an apocalyptic number.

221077430 is an abundant number, since it is smaller than the sum of its proper divisors (248385610).

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

221077430 is a wasteful number, since it uses less digits than its factorization.

221077430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101924.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 221077430 is about 14868.6727719726. The cubic root of 221077430 is about 604.6649603178.

The spelling of 221077430 in words is "two hundred twenty-one million, seventy-seven thousand, four hundred thirty".