2015354142251 has 4 divisors (see below), whose sum is σ = 2015356982904. Its totient is φ = 2015351301600.

The previous prime is 2015354142247. The next prime is 2015354142259. The reversal of 2015354142251 is 1522414535102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2015354142251 - 2² = 2015354142247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015354142259) 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, 643556 + ... + 2108286.

It is an arithmetic number, because the mean of its divisors is an integer number (503839245726).

Almost surely, 2^{2015354142251} is an apocalyptic number.

2015354142251 is a deficient number, since it is larger than the sum of its proper divisors (2840653).

2015354142251 is a wasteful number, since it uses less digits than its factorization.

2015354142251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840652.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 2015354142251 its reverse (1522414535102), we get a palindrome (3537768677353).

The spelling of 2015354142251 in words is "two trillion, fifteen billion, three hundred fifty-four million, one hundred forty-two thousand, two hundred fifty-one".