251105367442 has 16 divisors (see below), whose sum is σ = 383499817632. Its totient is φ = 123287248800.

The previous prime is 251105367419. The next prime is 251105367463. The reversal of 251105367442 is 244763501152.

It is a junction number, because it is equal to n+sod(n) for n = 251105367395 and 251105367404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3755184 + ... + 3821467.

It is an arithmetic number, because the mean of its divisors is an integer number (23968738602).

Almost surely, 2^251105367442 is an apocalyptic number.

251105367442 is a deficient number, since it is larger than the sum of its proper divisors (132394450190).

251105367442 is a wasteful number, since it uses less digits than its factorization.

251105367442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576953.

The product of its (nonzero) digits is 201600, while the sum is 40.

Adding to 251105367442 its reverse (244763501152), we get a palindrome (495868868594).

The spelling of 251105367442 in words is "two hundred fifty-one billion, one hundred five million, three hundred sixty-seven thousand, four hundred forty-two".