1631241065 has 4 divisors (see below), whose sum is σ = 1957489284. Its totient is φ = 1304992848.

The previous prime is 1631241061. The next prime is 1631241083. The reversal of 1631241065 is 5601421361.

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: 5601421361 = 27551 ⋅203311.

It can be written as a sum of positive squares in 2 ways, for example, as 1240941529 + 390299536 = 35227^2 + 19756^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631241065 - 2² = 1631241061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631241061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163124102 + ... + 163124111.

It is an arithmetic number, because the mean of its divisors is an integer number (489372321).

Almost surely, 2^1631241065 is an apocalyptic number.

It is an amenable number.

1631241065 is a deficient number, since it is larger than the sum of its proper divisors (326248219).

1631241065 is an equidigital number, since it uses as much as digits as its factorization.

1631241065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326248218.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1631241065 is about 40388.6254408342. The cubic root of 1631241065 is about 1177.1705321285.

The spelling of 1631241065 in words is "one billion, six hundred thirty-one million, two hundred forty-one thousand, sixty-five".