251241222 has 8 divisors (see below), whose sum is σ = 502482456. Its totient is φ = 83747072.

The previous prime is 251241173. The next prime is 251241229. The reversal of 251241222 is 222142152.

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

251241222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251241229) 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, 20936763 + ... + 20936774.

It is an arithmetic number, because the mean of its divisors is an integer number (62810307).

Almost surely, 2^251241222 is an apocalyptic number.

251241222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251241222 is a wasteful number, since it uses less digits than its factorization.

251241222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41873542.

The product of its digits is 640, while the sum is 21.

The square root of 251241222 is about 15850.5905883661. The cubic root of 251241222 is about 631.0013654413.

Adding to 251241222 its reverse (222142152), we get a palindrome (473383374).

It can be divided in two parts, 2512 and 41222, that added together give a palindrome (43734).

The spelling of 251241222 in words is "two hundred fifty-one million, two hundred forty-one thousand, two hundred twenty-two".