251340221201 has 8 divisors (see below), whose sum is σ = 261828230400. Its totient is φ = 241000978320.

The previous prime is 251340221183. The next prime is 251340221257. The reversal of 251340221201 is 102122043152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251340221201 - 2⁶ = 251340221137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251340221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37188131 + ... + 37194888.

It is an arithmetic number, because the mean of its divisors is an integer number (32728528800).

Almost surely, 2^251340221201 is an apocalyptic number.

It is an amenable number.

251340221201 is a deficient number, since it is larger than the sum of its proper divisors (10488009199).

251340221201 is a wasteful number, since it uses less digits than its factorization.

251340221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74383159.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 251340221201 its reverse (102122043152), we get a palindrome (353462264353).

The spelling of 251340221201 in words is "two hundred fifty-one billion, three hundred forty million, two hundred twenty-one thousand, two hundred one".