2145573601 has 4 divisors (see below), whose sum is σ = 2164561092. Its totient is φ = 2126586112.

The previous prime is 2145573589. The next prime is 2145573631. The reversal of 2145573601 is 1063755412.

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 360088576 + 1785485025 = 18976^2 + 42255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145573601 - 2¹⁵ = 2145540833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145573631) 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, 9493576 + ... + 9493801.

It is an arithmetic number, because the mean of its divisors is an integer number (541140273).

Almost surely, 2^2145573601 is an apocalyptic number.

It is an amenable number.

2145573601 is a deficient number, since it is larger than the sum of its proper divisors (18987491).

2145573601 is a wasteful number, since it uses less digits than its factorization.

2145573601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18987490.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 2145573601 is about 46320.3367971348. The cubic root of 2145573601 is about 1289.7765374198.

The spelling of 2145573601 in words is "two billion, one hundred forty-five million, five hundred seventy-three thousand, six hundred one".