197021853 has 24 divisors (see below), whose sum is σ = 336460800. Its totient is φ = 108700704.

The previous prime is 197021819. The next prime is 197021863. The reversal of 197021853 is 358120791.

It is not a de Polignac number, because 197021853 - 2¹² = 197017757 is a prime.

It is a super-2 number, since 2×197021853² = 77635221119107218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197021863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52093 + ... + 55746.

It is an arithmetic number, because the mean of its divisors is an integer number (14019200).

Almost surely, 2^197021853 is an apocalyptic number.

It is an amenable number.

197021853 is a deficient number, since it is larger than the sum of its proper divisors (139438947).

197021853 is a wasteful number, since it uses less digits than its factorization.

197021853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107881 (or 107878 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 197021853 is about 14036.4473069221. The cubic root of 197021853 is about 581.8863011677.

The spelling of 197021853 in words is "one hundred ninety-seven million, twenty-one thousand, eight hundred fifty-three".