2102391555515 has 8 divisors (see below), whose sum is σ = 2609865379440. Its totient is φ = 1623916235872.

The previous prime is 2102391555491. The next prime is 2102391555587. The reversal of 2102391555515 is 5155551932012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2102391555515 - 2²⁰ = 2102390506939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7249625909 + ... + 7249626198.

It is an arithmetic number, because the mean of its divisors is an integer number (326233172430).

Almost surely, 2^{2102391555515} is an apocalyptic number.

2102391555515 is a deficient number, since it is larger than the sum of its proper divisors (507473823925).

2102391555515 is a wasteful number, since it uses less digits than its factorization.

2102391555515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14499252141.

The product of its (nonzero) digits is 337500, while the sum is 44.

The spelling of 2102391555515 in words is "two trillion, one hundred two billion, three hundred ninety-one million, five hundred fifty-five thousand, five hundred fifteen".