2321661445 has 4 divisors (see below), whose sum is σ = 2785993740. Its totient is φ = 1857329152.

The previous prime is 2321661437. The next prime is 2321661481. The reversal of 2321661445 is 5441661232.

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 1377820161 + 943841284 = 37119^2 + 30722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321661445 - 2³ = 2321661437 is a prime.

It is a super-2 number, since 2×2321661445² = 10780223730398976050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2321661445.

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, 232166140 + ... + 232166149.

It is an arithmetic number, because the mean of its divisors is an integer number (696498435).

Almost surely, 2^2321661445 is an apocalyptic number.

It is an amenable number.

2321661445 is a deficient number, since it is larger than the sum of its proper divisors (464332295).

2321661445 is an equidigital number, since it uses as much as digits as its factorization.

2321661445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464332294.

The product of its digits is 34560, while the sum is 34.

The square root of 2321661445 is about 48183.6221656280. The cubic root of 2321661445 is about 1324.1371280055.

The spelling of 2321661445 in words is "two billion, three hundred twenty-one million, six hundred sixty-one thousand, four hundred forty-five".