251423042102 has 4 divisors (see below), whose sum is σ = 377134563156. Its totient is φ = 125711521050.

The previous prime is 251423042071. The next prime is 251423042131. The reversal of 251423042102 is 201240324152.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62855760524 + ... + 62855760527.

It is an arithmetic number, because the mean of its divisors is an integer number (94283640789).

Almost surely, 2^251423042102 is an apocalyptic number.

251423042102 is a deficient number, since it is larger than the sum of its proper divisors (125711521054).

251423042102 is a wasteful number, since it uses less digits than its factorization.

251423042102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125711521053.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 251423042102 its reverse (201240324152), we get a palindrome (452663366254).

The spelling of 251423042102 in words is "two hundred fifty-one billion, four hundred twenty-three million, forty-two thousand, one hundred two".