251606068 has 24 divisors (see below), whose sum is σ = 516814592. Its totient is φ = 104916384.

The previous prime is 251606063. The next prime is 251606081. The reversal of 251606068 is 860606152.

It is a super-2 number, since 2×251606068² = 126611226908841248, which contains 22 as substring.

251606068 is a modest number, since divided by 6068 gives 2516 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251606063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120396 + ... + 122467.

Almost surely, 2^251606068 is an apocalyptic number.

251606068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

251606068 is an abundant number, since it is smaller than the sum of its proper divisors (265208524).

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

251606068 is a wasteful number, since it uses less digits than its factorization.

251606068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242911 (or 242909 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 251606068 is about 15862.0953218672. The cubic root of 251606068 is about 631.3066589930.

The spelling of 251606068 in words is "two hundred fifty-one million, six hundred six thousand, sixty-eight".