251541412042342 has 4 divisors (see below), whose sum is σ = 377312118063516. Its totient is φ = 125770706021170.

The previous prime is 251541412042301. The next prime is 251541412042369. The reversal of 251541412042342 is 243240214145152.

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

It is a junction number, because it is equal to n+sod(n) for n = 251541412042295 and 251541412042304.

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, 62885353010584 + ... + 62885353010587.

It is an arithmetic number, because the mean of its divisors is an integer number (94328029515879).

Almost surely, 2^{251541412042342} is an apocalyptic number.

251541412042342 is a deficient number, since it is larger than the sum of its proper divisors (125770706021174).

251541412042342 is a wasteful number, since it uses less digits than its factorization.

251541412042342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125770706021173.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 251541412042342 its reverse (243240214145152), we get a palindrome (494781626187494).

The spelling of 251541412042342 in words is "two hundred fifty-one trillion, five hundred forty-one billion, four hundred twelve million, forty-two thousand, three hundred forty-two".