251234450342 has 4 divisors (see below), whose sum is σ = 376851675516. Its totient is φ = 125617225170.

The previous prime is 251234450329. The next prime is 251234450347. The reversal of 251234450342 is 243054432152.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251234450347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62808612584 + ... + 62808612587.

It is an arithmetic number, because the mean of its divisors is an integer number (94212918879).

Almost surely, 2^251234450342 is an apocalyptic number.

251234450342 is a deficient number, since it is larger than the sum of its proper divisors (125617225174).

251234450342 is a wasteful number, since it uses less digits than its factorization.

251234450342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125617225173.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 251234450342 its reverse (243054432152), we get a palindrome (494288882494).

The spelling of 251234450342 in words is "two hundred fifty-one billion, two hundred thirty-four million, four hundred fifty thousand, three hundred forty-two".