195057731 has 6 divisors (see below), whose sum is σ = 212840796. Its totient is φ = 177283100.

The previous prime is 195057721. The next prime is 195057749. The reversal of 195057731 is 137750591.

It is not a de Polignac number, because 195057731 - 2¹⁰ = 195056707 is a prime.

It is a super-2 number, since 2×195057731² = 76095036845736722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195057701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44216 + ... + 48426.

It is an arithmetic number, because the mean of its divisors is an integer number (35473466).

Almost surely, 2^195057731 is an apocalyptic number.

195057731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195057731 is a deficient number, since it is larger than the sum of its proper divisors (17783065).

195057731 is an frugal number, since it uses more digits than its factorization.

195057731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8433 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 195057731 is about 13966.3069921866. The cubic root of 195057731 is about 579.9462207369.

The spelling of 195057731 in words is "one hundred ninety-five million, fifty-seven thousand, seven hundred thirty-one".