3871210257215 has 32 divisors (see below), whose sum is σ = 5377975572480. Its totient is φ = 2620245003264.

The previous prime is 3871210257209. The next prime is 3871210257247. The reversal of 3871210257215 is 5127520121783.

It is a happy number.

It is not a de Polignac number, because 3871210257215 - 2⁴ = 3871210257199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217607 + ... + 2791016.

It is an arithmetic number, because the mean of its divisors is an integer number (168061736640).

Almost surely, 2^{3871210257215} is an apocalyptic number.

3871210257215 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3871210257215 is a deficient number, since it is larger than the sum of its proper divisors (1506765315265).

3871210257215 is a wasteful number, since it uses less digits than its factorization.

3871210257215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009111.

The product of its (nonzero) digits is 235200, while the sum is 44.

Adding to 3871210257215 its reverse (5127520121783), we get a palindrome (8998730378998).

The spelling of 3871210257215 in words is "three trillion, eight hundred seventy-one billion, two hundred ten million, two hundred fifty-seven thousand, two hundred fifteen".