251339382349 has 4 divisors (see below), whose sum is σ = 274188417120. Its totient is φ = 228490347580.

The previous prime is 251339382331. The next prime is 251339382353. The reversal of 251339382349 is 943283933152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 251339382349 - 2¹⁵ = 251339349581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251339382296 and 251339382305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251339382319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11424517369 + ... + 11424517390.

It is an arithmetic number, because the mean of its divisors is an integer number (68547104280).

Almost surely, 2^251339382349 is an apocalyptic number.

It is an amenable number.

251339382349 is a deficient number, since it is larger than the sum of its proper divisors (22849034771).

251339382349 is a wasteful number, since it uses less digits than its factorization.

251339382349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22849034770.

The product of its digits is 4199040, while the sum is 52.

The spelling of 251339382349 in words is "two hundred fifty-one billion, three hundred thirty-nine million, three hundred eighty-two thousand, three hundred forty-nine".