251441140 has 12 divisors (see below), whose sum is σ = 528026436. Its totient is φ = 100576448.

The previous prime is 251441053. The next prime is 251441143. The reversal of 251441140 is 41144152.

It can be written as a sum of positive squares in 2 ways, for example, as 84566416 + 166874724 = 9196^2 + 12918^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251441143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6286009 + ... + 6286048.

It is an arithmetic number, because the mean of its divisors is an integer number (44002203).

Almost surely, 2^251441140 is an apocalyptic number.

251441140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251441140 is an abundant number, since it is smaller than the sum of its proper divisors (276585296).

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

251441140 is a wasteful number, since it uses less digits than its factorization.

251441140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12572066 (or 12572064 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 251441140 is about 15856.8956608789. The cubic root of 251441140 is about 631.1686881509.

Adding to 251441140 its reverse (41144152), we get a palindrome (292585292).

The spelling of 251441140 in words is "two hundred fifty-one million, four hundred forty-one thousand, one hundred forty".