253206821267 has 4 divisors (see below), whose sum is σ = 264215813520. Its totient is φ = 242197829016.

The previous prime is 253206821251. The next prime is 253206821269. The reversal of 253206821267 is 762128602352.

It is a happy number.

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

It is not a de Polignac number, because 253206821267 - 2⁴ = 253206821251 is a prime.

It is a super-2 number, since 2×253206821267² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253206821269) 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, 5504496092 + ... + 5504496137.

It is an arithmetic number, because the mean of its divisors is an integer number (66053953380).

Almost surely, 2^253206821267 is an apocalyptic number.

253206821267 is a deficient number, since it is larger than the sum of its proper divisors (11008992253).

253206821267 is a wasteful number, since it uses less digits than its factorization.

253206821267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008992252.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 253206821267 in words is "two hundred fifty-three billion, two hundred six million, eight hundred twenty-one thousand, two hundred sixty-seven".