251613562042 has 16 divisors (see below), whose sum is σ = 383151024000. Its totient is φ = 123904497600.

The previous prime is 251613562003. The next prime is 251613562043. The reversal of 251613562042 is 240265316152.

251613562042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 251613561992 and 251613562010.

It is not an unprimeable number, because it can be changed into a prime (251613562043) 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 7 ways as a sum of consecutive naturals, for example, 1922292 + ... + 2049007.

It is an arithmetic number, because the mean of its divisors is an integer number (23946939000).

Almost surely, 2^251613562042 is an apocalyptic number.

251613562042 is a deficient number, since it is larger than the sum of its proper divisors (131537461958).

251613562042 is a wasteful number, since it uses less digits than its factorization.

251613562042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971781.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 251613562042 its reverse (240265316152), we get a palindrome (491878878194).

The spelling of 251613562042 in words is "two hundred fifty-one billion, six hundred thirteen million, five hundred sixty-two thousand, forty-two".