2151431445 has 32 divisors (see below), whose sum is σ = 3473775360. Its totient is φ = 1136977920.

The previous prime is 2151431419. The next prime is 2151431453. The reversal of 2151431445 is 5441341512.

It is not a de Polignac number, because 2151431445 - 2¹⁷ = 2151300373 is a prime.

It is a super-3 number, since 3×2151431445³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1032805 + ... + 1034885.

It is an arithmetic number, because the mean of its divisors is an integer number (108555480).

Almost surely, 2^2151431445 is an apocalyptic number.

It is an amenable number.

2151431445 is a deficient number, since it is larger than the sum of its proper divisors (1322343915).

2151431445 is a wasteful number, since it uses less digits than its factorization.

2151431445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685.

The product of its digits is 9600, while the sum is 30.

The square root of 2151431445 is about 46383.5255775151. The cubic root of 2151431445 is about 1290.9492532417.

Adding to 2151431445 its reverse (5441341512), we get a palindrome (7592772957).

The spelling of 2151431445 in words is "two billion, one hundred fifty-one million, four hundred thirty-one thousand, four hundred forty-five".