251473252 has 6 divisors (see below), whose sum is σ = 440078198. Its totient is φ = 125736624.

The previous prime is 251473249. The next prime is 251473259. The reversal of 251473252 is 252374152.

It can be written as a sum of positive squares in only one way, i.e., 251412736 + 60516 = 15856^2 + 246^2 .

It is not an unprimeable number, because it can be changed into a prime (251473259) 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 as a sum of consecutive naturals, namely, 31434153 + ... + 31434160.

Almost surely, 2^251473252 is an apocalyptic number.

It is an amenable number.

251473252 is a deficient number, since it is larger than the sum of its proper divisors (188604946).

251473252 is a wasteful number, since it uses less digits than its factorization.

251473252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62868317 (or 62868315 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 251473252 is about 15857.9081848773. The cubic root of 251473252 is about 631.1955562364.

The spelling of 251473252 in words is "two hundred fifty-one million, four hundred seventy-three thousand, two hundred fifty-two".