2101510455 has 48 divisors (see below), whose sum is σ = 3716879712. Its totient is φ = 1013126400.

The previous prime is 2101510441. The next prime is 2101510457. The reversal of 2101510455 is 5540151012.

It is not a de Polignac number, because 2101510455 - 2²⁷ = 1967292727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101510457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 325317 + ... + 331713.

It is an arithmetic number, because the mean of its divisors is an integer number (77434994).

Almost surely, 2^2101510455 is an apocalyptic number.

2101510455 is a deficient number, since it is larger than the sum of its proper divisors (1615369257).

2101510455 is a wasteful number, since it uses less digits than its factorization.

2101510455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608 (or 6597 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2101510455 is about 45842.2344023500. The cubic root of 2101510455 is about 1280.8861163590.

Adding to 2101510455 its reverse (5540151012), we get a palindrome (7641661467).

The spelling of 2101510455 in words is "two billion, one hundred one million, five hundred ten thousand, four hundred fifty-five".