2155415211541 has 4 divisors (see below), whose sum is σ = 2155515349900. Its totient is φ = 2155315073184.

The previous prime is 2155415211491. The next prime is 2155415211557. The reversal of 2155415211541 is 1451125145512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1349962810641 + 805452400900 = 1161879^2 + 897470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155415211541 - 2²⁷ = 2155280993813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155415211541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155415211571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50036886 + ... + 50079943.

It is an arithmetic number, because the mean of its divisors is an integer number (538878837475).

Almost surely, 2^{2155415211541} is an apocalyptic number.

It is an amenable number.

2155415211541 is a deficient number, since it is larger than the sum of its proper divisors (100138359).

2155415211541 is a wasteful number, since it uses less digits than its factorization.

2155415211541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100138358.

The product of its digits is 40000, while the sum is 37.

The spelling of 2155415211541 in words is "two trillion, one hundred fifty-five billion, four hundred fifteen million, two hundred eleven thousand, five hundred forty-one".