61552217 has 4 divisors (see below), whose sum is σ = 61770000. Its totient is φ = 61334436.

The previous prime is 61552199. The next prime is 61552241. The reversal of 61552217 is 71225516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61552217 - 2⁸ = 61551961 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 61552217.

It is not an unprimeable number, because it can be changed into a prime (61552247) 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, 108467 + ... + 109032.

It is an arithmetic number, because the mean of its divisors is an integer number (15442500).

Almost surely, 2^61552217 is an apocalyptic number.

It is an amenable number.

61552217 is a deficient number, since it is larger than the sum of its proper divisors (217783).

61552217 is a wasteful number, since it uses less digits than its factorization.

61552217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217782.

The product of its digits is 4200, while the sum is 29.

The square root of 61552217 is about 7845.5220986242. The cubic root of 61552217 is about 394.8340209560.

The spelling of 61552217 in words is "sixty-one million, five hundred fifty-two thousand, two hundred seventeen".