5155091821 has 8 divisors (see below), whose sum is σ = 5868247104. Its totient is φ = 4482688320.

The previous prime is 5155091803. The next prime is 5155091839. The reversal of 5155091821 is 1281905515.

It is an interprime number because it is at equal distance from previous prime (5155091803) and next prime (5155091839).

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

It is not a de Polignac number, because 5155091821 - 2²¹ = 5152994669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5155091801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10187676 + ... + 10188181.

It is an arithmetic number, because the mean of its divisors is an integer number (733530888).

Almost surely, 2^5155091821 is an apocalyptic number.

It is an amenable number.

5155091821 is a deficient number, since it is larger than the sum of its proper divisors (713155283).

5155091821 is a wasteful number, since it uses less digits than its factorization.

5155091821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20375891.

The product of its (nonzero) digits is 18000, while the sum is 37.

The square root of 5155091821 is about 71798.9681053983. The cubic root of 5155091821 is about 1727.4764482078.

The spelling of 5155091821 in words is "five billion, one hundred fifty-five million, ninety-one thousand, eight hundred twenty-one".