195361531 has 4 divisors (see below), whose sum is σ = 196560232. Its totient is φ = 194162832.

The previous prime is 195361493. The next prime is 195361547. The reversal of 195361531 is 135163591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135163591 = 83 ⋅1628477.

It is a cyclic number.

It is not a de Polignac number, because 195361531 - 2¹³ = 195353339 is a prime.

It is a super-2 number, since 2×195361531² = 76332255589327922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195361561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599106 + ... + 599431.

It is an arithmetic number, because the mean of its divisors is an integer number (49140058).

Almost surely, 2^195361531 is an apocalyptic number.

195361531 is a deficient number, since it is larger than the sum of its proper divisors (1198701).

195361531 is a wasteful number, since it uses less digits than its factorization.

195361531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198700.

The product of its digits is 12150, while the sum is 34.

The square root of 195361531 is about 13977.1789356794. The cubic root of 195361531 is about 580.2471509111.

The spelling of 195361531 in words is "one hundred ninety-five million, three hundred sixty-one thousand, five hundred thirty-one".