251470068 has 12 divisors (see below), whose sum is σ = 586763520. Its totient is φ = 83823352.

The previous prime is 251470057. The next prime is 251470091. The reversal of 251470068 is 860074152.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10477908 + ... + 10477931.

It is an arithmetic number, because the mean of its divisors is an integer number (48896960).

Almost surely, 2^251470068 is an apocalyptic number.

It is an amenable number.

251470068 is an abundant number, since it is smaller than the sum of its proper divisors (335293452).

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

251470068 is a wasteful number, since it uses less digits than its factorization.

251470068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20955846 (or 20955844 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 251470068 is about 15857.8077930085. The cubic root of 251470068 is about 631.1928922883.

The spelling of 251470068 in words is "two hundred fifty-one million, four hundred seventy thousand, sixty-eight".