61038221 has 4 divisors (see below), whose sum is σ = 61056252. Its totient is φ = 61020192.

The previous prime is 61038191. The next prime is 61038223. The reversal of 61038221 is 12283016.

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 10982596 + 50055625 = 3314^2 + 7075^2 .

It is a cyclic number.

It is not a de Polignac number, because 61038221 - 2⁶ = 61038157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61038223) 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, 2240 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (15264063).

Almost surely, 2^61038221 is an apocalyptic number.

It is an amenable number.

61038221 is a deficient number, since it is larger than the sum of its proper divisors (18031).

61038221 is a wasteful number, since it uses less digits than its factorization.

61038221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18030.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 61038221 is about 7812.6961415378. The cubic root of 61038221 is about 393.7319180073.

The spelling of 61038221 in words is "sixty-one million, thirty-eight thousand, two hundred twenty-one".