220194761 has 4 divisors (see below), whose sum is σ = 233147412. Its totient is φ = 207242112.

The previous prime is 220194697. The next prime is 220194769. The reversal of 220194761 is 167491022.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118810000 + 101384761 = 10900^2 + 10069^2 .

It is a cyclic number.

It is not a de Polignac number, because 220194761 - 2⁶ = 220194697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220194769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6476300 + ... + 6476333.

It is an arithmetic number, because the mean of its divisors is an integer number (58286853).

Almost surely, 2^220194761 is an apocalyptic number.

It is an amenable number.

220194761 is a deficient number, since it is larger than the sum of its proper divisors (12952651).

220194761 is a wasteful number, since it uses less digits than its factorization.

220194761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12952650.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 220194761 is about 14838.9609137567. The cubic root of 220194761 is about 603.8591628488.

The spelling of 220194761 in words is "two hundred twenty million, one hundred ninety-four thousand, seven hundred sixty-one".