61197221 has 8 divisors (see below), whose sum is σ = 63598080. Its totient is φ = 58815792.

The previous prime is 61197211. The next prime is 61197247. The reversal of 61197221 is 12279116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61197221 - 2²² = 57002917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61197211) 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, 1736 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (7949760).

Almost surely, 2^61197221 is an apocalyptic number.

It is an amenable number.

61197221 is a deficient number, since it is larger than the sum of its proper divisors (2400859).

61197221 is a wasteful number, since it uses less digits than its factorization.

61197221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9715.

The product of its digits is 1512, while the sum is 29.

The square root of 61197221 is about 7822.8652679181. The cubic root of 61197221 is about 394.0735023099.

The spelling of 61197221 in words is "sixty-one million, one hundred ninety-seven thousand, two hundred twenty-one".