251330433342 has 16 divisors (see below), whose sum is σ = 502676671872. Its totient is φ = 83774176920.

The previous prime is 251330433311. The next prime is 251330433353. The reversal of 251330433342 is 243334033152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446578 + ... + 837909.

It is an arithmetic number, because the mean of its divisors is an integer number (31417291992).

Almost surely, 2^251330433342 is an apocalyptic number.

251330433342 is an abundant number, since it is smaller than the sum of its proper divisors (251346238530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251330433342 is a wasteful number, since it uses less digits than its factorization.

251330433342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317103.

The product of its (nonzero) digits is 77760, while the sum is 33.

Adding to 251330433342 its reverse (243334033152), we get a palindrome (494664466494).

The spelling of 251330433342 in words is "two hundred fifty-one billion, three hundred thirty million, four hundred thirty-three thousand, three hundred forty-two".