251214424420342 has 4 divisors (see below), whose sum is σ = 376821636630516. Its totient is φ = 125607212210170.

The previous prime is 251214424420327. The next prime is 251214424420369. The reversal of 251214424420342 is 243024424412152.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 251214424420295 and 251214424420304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62803606105084 + ... + 62803606105087.

It is an arithmetic number, because the mean of its divisors is an integer number (94205409157629).

Almost surely, 2^{251214424420342} is an apocalyptic number.

251214424420342 is a deficient number, since it is larger than the sum of its proper divisors (125607212210174).

251214424420342 is a wasteful number, since it uses less digits than its factorization.

251214424420342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125607212210173.

The product of its (nonzero) digits is 491520, while the sum is 40.

Adding to 251214424420342 its reverse (243024424412152), we get a palindrome (494238848832494).

The spelling of 251214424420342 in words is "two hundred fifty-one trillion, two hundred fourteen billion, four hundred twenty-four million, four hundred twenty thousand, three hundred forty-two".