2151563465 has 8 divisors (see below), whose sum is σ = 2582125128. Its totient is φ = 1721084800.

The previous prime is 2151563419. The next prime is 2151563483. The reversal of 2151563465 is 5643651512.

It can be written as a sum of positive squares in 4 ways, for example, as 84860944 + 2066702521 = 9212^2 + 45461^2 .

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

It is not a de Polignac number, because 2151563465 - 2¹² = 2151559369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 91415 + ... + 112515.

It is an arithmetic number, because the mean of its divisors is an integer number (322765641).

Almost surely, 2^2151563465 is an apocalyptic number.

It is an amenable number.

2151563465 is a deficient number, since it is larger than the sum of its proper divisors (430561663).

2151563465 is a wasteful number, since it uses less digits than its factorization.

2151563465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41499.

The product of its digits is 108000, while the sum is 38.

The square root of 2151563465 is about 46384.9486902810. The cubic root of 2151563465 is about 1290.9756585504.

The spelling of 2151563465 in words is "two billion, one hundred fifty-one million, five hundred sixty-three thousand, four hundred sixty-five".