2145200031 has 40 divisors (see below), whose sum is σ = 3562441344. Its totient is φ = 1277519040.

The previous prime is 2145200021. The next prime is 2145200047. The reversal of 2145200031 is 1300025412.

It is not a de Polignac number, because 2145200031 - 2⁶ = 2145199967 is a prime.

It is a super-2 number, since 2×2145200031² = 9203766346004801922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145199977 and 2145200013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145200021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 216 + ... + 65501.

Almost surely, 2^2145200031 is an apocalyptic number.

2145200031 is a deficient number, since it is larger than the sum of its proper divisors (1417241313).

2145200031 is a wasteful number, since it uses less digits than its factorization.

2145200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65773 (or 65764 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2145200031 is about 46316.3041595506. The cubic root of 2145200031 is about 1289.7016779063.

Adding to 2145200031 its reverse (1300025412), we get a palindrome (3445225443).

The spelling of 2145200031 in words is "two billion, one hundred forty-five million, two hundred thousand, thirty-one".