3995212815 has 192 divisors, whose sum is σ = 8400817152. Its totient is φ = 1801958400.

The previous prime is 3995212801. The next prime is 3995212829. The reversal of 3995212815 is 5182125993.

3995212815 is a `hidden beast` number, since 3 + 99 + 521 + 28 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (3995212801) and next prime (3995212829).

It is not a de Polignac number, because 3995212815 - 2⁹ = 3995212303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (194400) is a multiple of the sum of its prime divisors (400).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12603037 + ... + 12603353.

It is an arithmetic number, because the mean of its divisors is an integer number (43754256).

Almost surely, 2^3995212815 is an apocalyptic number.

3995212815 is an abundant number, since it is smaller than the sum of its proper divisors (4405604337).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3995212815 is a wasteful number, since it uses less digits than its factorization.

3995212815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 400 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 3995212815 is about 63207.6958526412. The cubic root of 3995212815 is about 1586.7675339615.

The spelling of 3995212815 in words is "three billion, nine hundred ninety-five million, two hundred twelve thousand, eight hundred fifteen".