975100221 has 8 divisors (see below), whose sum is σ = 1444592960. Its totient is φ = 650066796.

The previous prime is 975100213. The next prime is 975100223. The reversal of 975100221 is 122001579.

It is not a de Polignac number, because 975100221 - 2³ = 975100213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 36114823 = 975100221 / (9 + 7 + 5 + 1 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (975100223) 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, 18057385 + ... + 18057438.

It is an arithmetic number, because the mean of its divisors is an integer number (180574120).

Almost surely, 2^975100221 is an apocalyptic number.

It is an amenable number.

975100221 is a deficient number, since it is larger than the sum of its proper divisors (469492739).

975100221 is a wasteful number, since it uses less digits than its factorization.

975100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36114832 (or 36114826 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 975100221 is about 31226.5947711242. The cubic root of 975100221 is about 991.6302158231.

The spelling of 975100221 in words is "nine hundred seventy-five million, one hundred thousand, two hundred twenty-one".