2145523153 has 8 divisors (see below), whose sum is σ = 2273642280. Its totient is φ = 2021013120.

The previous prime is 2145523117. The next prime is 2145523223. The reversal of 2145523153 is 3513255412.

It can be written as a sum of positive squares in 4 ways, for example, as 19114384 + 2126408769 = 4372^2 + 46113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145523153 - 2⁹ = 2145522641 is a prime.

It is a super-2 number, since 2×2145523153² = 9206539200118122818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145521153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901050 + ... + 903427.

It is an arithmetic number, because the mean of its divisors is an integer number (284205285).

Almost surely, 2^2145523153 is an apocalyptic number.

It is an amenable number.

2145523153 is a deficient number, since it is larger than the sum of its proper divisors (128119127).

2145523153 is a wasteful number, since it uses less digits than its factorization.

2145523153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804547.

The product of its digits is 18000, while the sum is 31.

The square root of 2145523153 is about 46319.7922383078. The cubic root of 2145523153 is about 1289.7664286767.

Adding to 2145523153 its reverse (3513255412), we get a palindrome (5658778565).

The spelling of 2145523153 in words is "two billion, one hundred forty-five million, five hundred twenty-three thousand, one hundred fifty-three".