2043242043251 has 4 divisors (see below), whose sum is σ = 2044258078104. Its totient is φ = 2042226008400.

The previous prime is 2043242043229. The next prime is 2043242043257. The reversal of 2043242043251 is 1523402423402.

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

It is a cyclic number.

It is not a de Polignac number, because 2043242043251 - 2⁶ = 2043242043187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043242043257) 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, 508014410 + ... + 508018431.

It is an arithmetic number, because the mean of its divisors is an integer number (511064519526).

Almost surely, 2^{2043242043251} is an apocalyptic number.

2043242043251 is a deficient number, since it is larger than the sum of its proper divisors (1016034853).

2043242043251 is a wasteful number, since it uses less digits than its factorization.

2043242043251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016034852.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 2043242043251 its reverse (1523402423402), we get a palindrome (3566644466653).

The spelling of 2043242043251 in words is "two trillion, forty-three billion, two hundred forty-two million, forty-three thousand, two hundred fifty-one".