42521201252263 has 4 divisors (see below), whose sum is σ = 42737044913640. Its totient is φ = 42305357590888.

The previous prime is 42521201252149. The next prime is 42521201252267. The reversal of 42521201252263 is 36225210212524.

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 42521201252263 - 2⁹ = 42521201251751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521201252267) 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, 107921830393 + ... + 107921830786.

It is an arithmetic number, because the mean of its divisors is an integer number (10684261228410).

Almost surely, 2^{42521201252263} is an apocalyptic number.

42521201252263 is a deficient number, since it is larger than the sum of its proper divisors (215843661377).

42521201252263 is a wasteful number, since it uses less digits than its factorization.

42521201252263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215843661376.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 42521201252263 its reverse (36225210212524), we get a palindrome (78746411464787).

The spelling of 42521201252263 in words is "forty-two trillion, five hundred twenty-one billion, two hundred one million, two hundred fifty-two thousand, two hundred sixty-three".