251248222 has 8 divisors (see below), whose sum is σ = 377304696. Its totient is φ = 125479992.

The previous prime is 251248189. The next prime is 251248223. The reversal of 251248222 is 222842152.

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

It is a super-2 number, since 2×251248222² = 126251338116322568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251248223) 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, 69868 + ... + 73375.

It is an arithmetic number, because the mean of its divisors is an integer number (47163087).

Almost surely, 2^251248222 is an apocalyptic number.

251248222 is a deficient number, since it is larger than the sum of its proper divisors (126056474).

251248222 is a wasteful number, since it uses less digits than its factorization.

251248222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144122.

The product of its digits is 5120, while the sum is 28.

The square root of 251248222 is about 15850.8113987897. The cubic root of 251248222 is about 631.0072256375.

The spelling of 251248222 in words is "two hundred fifty-one million, two hundred forty-eight thousand, two hundred twenty-two".