251242012 has 48 divisors (see below), whose sum is σ = 516600000. Its totient is φ = 106865472.

The previous prime is 251241989. The next prime is 251242049. The reversal of 251242012 is 210242152.

It is a super-3 number, since 3×251242012³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 203814 + ... + 205042.

It is an arithmetic number, because the mean of its divisors is an integer number (10762500).

Almost surely, 2^251242012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251242012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258300000).

251242012 is an abundant number, since it is smaller than the sum of its proper divisors (265357988).

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

251242012 is a wasteful number, since it uses less digits than its factorization.

251242012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 251242012 is about 15850.6155085536. The cubic root of 251242012 is about 631.0020268118.

Adding to 251242012 its reverse (210242152), we get a palindrome (461484164).

The spelling of 251242012 in words is "two hundred fifty-one million, two hundred forty-two thousand, twelve".