2151432561 has 8 divisors (see below), whose sum is σ = 2871122080. Its totient is φ = 1433015712.

The previous prime is 2151432559. The next prime is 2151432589. The reversal of 2151432561 is 1652341512.

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

It is not a de Polignac number, because 2151432561 - 2¹ = 2151432559 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151432061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314215 + ... + 320988.

It is an arithmetic number, because the mean of its divisors is an integer number (358890260).

Almost surely, 2^2151432561 is an apocalyptic number.

It is an amenable number.

2151432561 is a deficient number, since it is larger than the sum of its proper divisors (719689519).

2151432561 is a wasteful number, since it uses less digits than its factorization.

2151432561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636335.

The product of its digits is 7200, while the sum is 30.

The square root of 2151432561 is about 46383.5376076470. The cubic root of 2151432561 is about 1290.9494764573.

The spelling of 2151432561 in words is "two billion, one hundred fifty-one million, four hundred thirty-two thousand, five hundred sixty-one".