1965133481 has 4 divisors (see below), whose sum is σ = 1988809872. Its totient is φ = 1941457092.

The previous prime is 1965133477. The next prime is 1965133507. The reversal of 1965133481 is 1843315691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1965133481 - 2² = 1965133477 is a prime.

It is a super-2 number, since 2×1965133481² = 7723499196294354722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965153481) 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, 11838071 + ... + 11838236.

It is an arithmetic number, because the mean of its divisors is an integer number (497202468).

Almost surely, 2^1965133481 is an apocalyptic number.

It is an amenable number.

1965133481 is a deficient number, since it is larger than the sum of its proper divisors (23676391).

1965133481 is an equidigital number, since it uses as much as digits as its factorization.

1965133481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23676390.

The product of its digits is 77760, while the sum is 41.

The square root of 1965133481 is about 44329.8260880866. The cubic root of 1965133481 is about 1252.5565768471.

The spelling of 1965133481 in words is "one billion, nine hundred sixty-five million, one hundred thirty-three thousand, four hundred eighty-one".