2101540215 has 8 divisors (see below), whose sum is σ = 3362464368. Its totient is φ = 1120821440.

The previous prime is 2101540183. The next prime is 2101540307. The reversal of 2101540215 is 5120451012.

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

It is not a de Polignac number, because 2101540215 - 2⁵ = 2101540183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101540191 and 2101540200.

It is a congruent number.

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, 70051326 + ... + 70051355.

It is an arithmetic number, because the mean of its divisors is an integer number (420308046).

Almost surely, 2^2101540215 is an apocalyptic number.

2101540215 is a deficient number, since it is larger than the sum of its proper divisors (1260924153).

2101540215 is a wasteful number, since it uses less digits than its factorization.

2101540215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140102689.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2101540215 is about 45842.5589927089. The cubic root of 2101540215 is about 1280.8921626436.

Adding to 2101540215 its reverse (5120451012), we get a palindrome (7221991227).

The spelling of 2101540215 in words is "two billion, one hundred one million, five hundred forty thousand, two hundred fifteen".