61221170 has 48 divisors (see below), whose sum is σ = 117536832. Its totient is φ = 22952160.

The previous prime is 61221169. The next prime is 61221191. The reversal of 61221170 is 7112216.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375509 + ... + 375671.

It is an arithmetic number, because the mean of its divisors is an integer number (2448684).

Almost surely, 2^61221170 is an apocalyptic number.

61221170 is a deficient number, since it is larger than the sum of its proper divisors (56315662).

61221170 is a wasteful number, since it uses less digits than its factorization.

61221170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 61221170 is about 7824.3958233208. The cubic root of 61221170 is about 394.1249013511.

Adding to 61221170 its reverse (7112216), we get a palindrome (68333386).

The spelling of 61221170 in words is "sixty-one million, two hundred twenty-one thousand, one hundred seventy".