251534534340 has 24 divisors (see below), whose sum is σ = 704296696320. Its totient is φ = 67075875808.

The previous prime is 251534534333. The next prime is 251534534351. The reversal of 251534534340 is 43435435152.

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, 2096121060 + ... + 2096121179.

It is an arithmetic number, because the mean of its divisors is an integer number (29345695680).

Almost surely, 2^251534534340 is an apocalyptic number.

251534534340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251534534340 is an abundant number, since it is smaller than the sum of its proper divisors (452762161980).

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

251534534340 is a wasteful number, since it uses less digits than its factorization.

251534534340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192242251 (or 4192242249 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 39.

Adding to 251534534340 its reverse (43435435152), we get a palindrome (294969969492).

The spelling of 251534534340 in words is "two hundred fifty-one billion, five hundred thirty-four million, five hundred thirty-four thousand, three hundred forty".