2131465445 has 4 divisors (see below), whose sum is σ = 2557758540. Its totient is φ = 1705172352.

The previous prime is 2131465433. The next prime is 2131465451. The reversal of 2131465445 is 5445641312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 303560929 + 1827904516 = 17423^2 + 42754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131465445 - 2¹² = 2131461349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213146540 + ... + 213146549.

It is an arithmetic number, because the mean of its divisors is an integer number (639439635).

Almost surely, 2^2131465445 is an apocalyptic number.

It is an amenable number.

2131465445 is a deficient number, since it is larger than the sum of its proper divisors (426293095).

2131465445 is an equidigital number, since it uses as much as digits as its factorization.

2131465445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426293094.

The product of its digits is 57600, while the sum is 35.

The square root of 2131465445 is about 46167.7966227543. The cubic root of 2131465445 is about 1286.9433559414.

The spelling of 2131465445 in words is "two billion, one hundred thirty-one million, four hundred sixty-five thousand, four hundred forty-five".