3815532901 has 8 divisors (see below), whose sum is σ = 3851955800. Its totient is φ = 3779136000.

The previous prime is 3815532893. The next prime is 3815532953. The reversal of 3815532901 is 1092355183.

It is a happy number.

It is a Cunningham number, because it is equal to 61770²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 679644900 + 3135888001 = 26070^2 + 55999^2 .

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

It is a 5-Lehmer number, since φ(3815532901) divides (3815532901-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 3815532901 - 2³ = 3815532893 is a prime.

It is a super-2 number, since 2×3815532901² = 29116582637226951602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3815532601) 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, 419401 + ... + 428401.

It is an arithmetic number, because the mean of its divisors is an integer number (481494475).

Almost surely, 2^3815532901 is an apocalyptic number.

It is an amenable number.

3815532901 is a deficient number, since it is larger than the sum of its proper divisors (36422899).

3815532901 is a wasteful number, since it uses less digits than its factorization.

3815532901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 3815532901 is about 61770.0000080945. Note that the first 5 decimals coincide. The cubic root of 3815532901 is about 1562.6140837533.

The spelling of 3815532901 in words is "three billion, eight hundred fifteen million, five hundred thirty-two thousand, nine hundred one".