251322401 has 8 divisors (see below), whose sum is σ = 280546464. Its totient is φ = 223161120.

The previous prime is 251322391. The next prime is 251322413. The reversal of 251322401 is 104223152.

251322401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 251322401 - 2¹⁰ = 251321377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251322431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265196 + ... + 266141.

It is an arithmetic number, because the mean of its divisors is an integer number (35068308).

Almost surely, 2^251322401 is an apocalyptic number.

It is an amenable number.

251322401 is a deficient number, since it is larger than the sum of its proper divisors (29224063).

251322401 is a wasteful number, since it uses less digits than its factorization.

251322401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531391.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 251322401 is about 15853.1511378653. The cubic root of 251322401 is about 631.0693194490.

Adding to 251322401 its reverse (104223152), we get a palindrome (355545553).

The spelling of 251322401 in words is "two hundred fifty-one million, three hundred twenty-two thousand, four hundred one".