195621426 has 288 divisors, whose sum is σ = 611331840. Its totient is φ = 45904320.

The previous prime is 195621421. The next prime is 195621427. The reversal of 195621426 is 624126591.

195621426 = 313² + 314² + ... + 851².

195621426 is a `hidden beast` number, since 1 + 9 + 5 + 621 + 4 + 26 = 666.

195621426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (195621421) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4162135 + ... + 4162181.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^195621426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195621426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305665920).

195621426 is an abundant number, since it is smaller than the sum of its proper divisors (415710414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195621426 is a wasteful number, since it uses less digits than its factorization.

195621426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 83 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 195621426 is about 13986.4729649758. The cubic root of 195621426 is about 580.5043433229.

The spelling of 195621426 in words is "one hundred ninety-five million, six hundred twenty-one thousand, four hundred twenty-six".