201253213779 has 4 divisors (see below), whose sum is σ = 268337618376. Its totient is φ = 134168809184.

The previous prime is 201253213727. The next prime is 201253213781. The reversal of 201253213779 is 977312352102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201253213779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201253213779.

It is not an unprimeable number, because it can be changed into a prime (201253213709) 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, 33542202294 + ... + 33542202299.

It is an arithmetic number, because the mean of its divisors is an integer number (67084404594).

Almost surely, 2^201253213779 is an apocalyptic number.

201253213779 is a deficient number, since it is larger than the sum of its proper divisors (67084404597).

201253213779 is an equidigital number, since it uses as much as digits as its factorization.

201253213779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67084404596.

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 201253213779 in words is "two hundred one billion, two hundred fifty-three million, two hundred thirteen thousand, seven hundred seventy-nine".