61772201 has 4 divisors (see below), whose sum is σ = 62642304. Its totient is φ = 60902100.

The previous prime is 61772197. The next prime is 61772239. The reversal of 61772201 is 10227716.

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 61772201 - 2² = 61772197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61772701) 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, 434945 + ... + 435086.

It is an arithmetic number, because the mean of its divisors is an integer number (15660576).

Almost surely, 2^61772201 is an apocalyptic number.

It is an amenable number.

61772201 is a deficient number, since it is larger than the sum of its proper divisors (870103).

61772201 is an equidigital number, since it uses as much as digits as its factorization.

61772201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870102.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 61772201 is about 7859.5293116064. The cubic root of 61772201 is about 395.3038328887.

Adding to 61772201 its reverse (10227716), we get a palindrome (71999917).

The spelling of 61772201 in words is "sixty-one million, seven hundred seventy-two thousand, two hundred one".