251424066 has 32 divisors (see below), whose sum is σ = 518770368. Its totient is φ = 81195840.

The previous prime is 251424049. The next prime is 251424071. The reversal of 251424066 is 660424152.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19396 + ... + 29648.

It is an arithmetic number, because the mean of its divisors is an integer number (16211574).

Almost surely, 2^251424066 is an apocalyptic number.

251424066 is an abundant number, since it is smaller than the sum of its proper divisors (267346302).

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

251424066 is a wasteful number, since it uses less digits than its factorization.

251424066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 251424066 is about 15856.3572739769. The cubic root of 251424066 is about 631.1544014168.

The spelling of 251424066 in words is "two hundred fifty-one million, four hundred twenty-four thousand, sixty-six".