251855060 has 48 divisors (see below), whose sum is σ = 553416192. Its totient is φ = 96096000.

The previous prime is 251855039. The next prime is 251855063. The reversal of 251855060 is 60558152.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251855063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276005 + ... + 276915.

It is an arithmetic number, because the mean of its divisors is an integer number (11529504).

Almost surely, 2^251855060 is an apocalyptic number.

251855060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251855060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276708096).

251855060 is an abundant number, since it is smaller than the sum of its proper divisors (301561132).

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

251855060 is a wasteful number, since it uses less digits than its factorization.

251855060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 251855060 is about 15869.9420288796. The cubic root of 251855060 is about 631.5148395627.

The spelling of 251855060 in words is "two hundred fifty-one million, eight hundred fifty-five thousand, sixty".