251042622 has 8 divisors (see below), whose sum is σ = 502085256. Its totient is φ = 83680872.

The previous prime is 251042599. The next prime is 251042629. The reversal of 251042622 is 226240152.

It is a happy number.

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

251042622 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 251042592 and 251042601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251042629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20920213 + ... + 20920224.

It is an arithmetic number, because the mean of its divisors is an integer number (62760657).

Almost surely, 2^251042622 is an apocalyptic number.

251042622 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.

251042622 is a wasteful number, since it uses less digits than its factorization.

251042622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41840442.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 251042622 is about 15844.3245990481. The cubic root of 251042622 is about 630.8350579320.

Adding to 251042622 its reverse (226240152), we get a palindrome (477282774).

The spelling of 251042622 in words is "two hundred fifty-one million, forty-two thousand, six hundred twenty-two".