201241615251 has 4 divisors (see below), whose sum is σ = 268322153672. Its totient is φ = 134161076832.

The previous prime is 201241615243. The next prime is 201241615261. The reversal of 201241615251 is 152516142102.

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

It is not a de Polignac number, because 201241615251 - 2³ = 201241615243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201241615261) 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, 33540269206 + ... + 33540269211.

It is an arithmetic number, because the mean of its divisors is an integer number (67080538418).

Almost surely, 2^201241615251 is an apocalyptic number.

201241615251 is a deficient number, since it is larger than the sum of its proper divisors (67080538421).

201241615251 is an equidigital number, since it uses as much as digits as its factorization.

201241615251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67080538420.

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 201241615251 its reverse (152516142102), we get a palindrome (353757757353).

The spelling of 201241615251 in words is "two hundred one billion, two hundred forty-one million, six hundred fifteen thousand, two hundred fifty-one".