251481552 has 80 divisors (see below), whose sum is σ = 753618432. Its totient is φ = 70773120.

The previous prime is 251481551. The next prime is 251481557. The reversal of 251481552 is 255184152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251481551) 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 15 ways as a sum of consecutive naturals, for example, 16927 + ... + 28097.

Almost surely, 2^251481552 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 251481552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376809216).

251481552 is an abundant number, since it is smaller than the sum of its proper divisors (502136880).

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

251481552 is a wasteful number, since it uses less digits than its factorization.

251481552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11256 (or 11250 counting only the distinct ones).

The product of its digits is 16000, while the sum is 33.

The square root of 251481552 is about 15858.1698817991. The cubic root of 251481552 is about 631.2025004680.

The spelling of 251481552 in words is "two hundred fifty-one million, four hundred eighty-one thousand, five hundred fifty-two".