195220845 has 48 divisors (see below), whose sum is σ = 347922432. Its totient is φ = 101214720.

The previous prime is 195220841. The next prime is 195220847. The reversal of 195220845 is 548022591.

It is not a de Polignac number, because 195220845 - 2² = 195220841 is a prime.

It is a super-2 number, since 2×195220845² = 76222356645028050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195220841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 509524 + ... + 509906.

It is an arithmetic number, because the mean of its divisors is an integer number (7248384).

Almost surely, 2^195220845 is an apocalyptic number.

195220845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

195220845 is a deficient number, since it is larger than the sum of its proper divisors (152701587).

195220845 is a wasteful number, since it uses less digits than its factorization.

195220845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 195220845 is about 13972.1453256112. The cubic root of 195220845 is about 580.1078327053.

The spelling of 195220845 in words is "one hundred ninety-five million, two hundred twenty thousand, eight hundred forty-five".