61050221 has 4 divisors (see below), whose sum is σ = 61225500. Its totient is φ = 60874944.

The previous prime is 61050193. The next prime is 61050229. The reversal of 61050221 is 12205016.

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 51984100 + 9066121 = 7210^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 61050221 - 2²² = 56855917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61050221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61050229) 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, 87116 + ... + 87813.

It is an arithmetic number, because the mean of its divisors is an integer number (15306375).

Almost surely, 2^61050221 is an apocalyptic number.

It is an amenable number.

61050221 is a deficient number, since it is larger than the sum of its proper divisors (175279).

61050221 is a wasteful number, since it uses less digits than its factorization.

61050221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175278.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 61050221 is about 7813.4640845146. The cubic root of 61050221 is about 393.7577186360.

Adding to 61050221 its reverse (12205016), we get a palindrome (73255237).

The spelling of 61050221 in words is "sixty-one million, fifty thousand, two hundred twenty-one".