2145662437 has 4 divisors (see below), whose sum is σ = 2145953196. Its totient is φ = 2145371680.

The previous prime is 2145662369. The next prime is 2145662443. The reversal of 2145662437 is 7342665412.

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 627702916 + 1517959521 = 25054^2 + 38961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145662437 - 2²³ = 2137273829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145662437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145663437) 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, 134014 + ... + 149167.

It is an arithmetic number, because the mean of its divisors is an integer number (536488299).

Almost surely, 2^2145662437 is an apocalyptic number.

It is an amenable number.

2145662437 is a deficient number, since it is larger than the sum of its proper divisors (290759).

2145662437 is an equidigital number, since it uses as much as digits as its factorization.

2145662437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290758.

The product of its digits is 241920, while the sum is 40.

The square root of 2145662437 is about 46321.2957180604. The cubic root of 2145662437 is about 1289.7943379444.

The spelling of 2145662437 in words is "two billion, one hundred forty-five million, six hundred sixty-two thousand, four hundred thirty-seven".