251862242 has 8 divisors (see below), whose sum is σ = 400016556. Its totient is φ = 118523392.

The previous prime is 251862241. The next prime is 251862269. The reversal of 251862242 is 242268152.

It can be written as a sum of positive squares in 2 ways, for example, as 237807241 + 14055001 = 15421^2 + 3749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×251862242³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251862199 and 251862208.

It is not an unprimeable number, because it can be changed into a prime (251862241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3703823 + ... + 3703890.

Almost surely, 2^251862242 is an apocalyptic number.

251862242 is a deficient number, since it is larger than the sum of its proper divisors (148154314).

251862242 is a wasteful number, since it uses less digits than its factorization.

251862242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407732.

The product of its digits is 15360, while the sum is 32.

The square root of 251862242 is about 15870.1683040855. The cubic root of 251862242 is about 631.5208423492.

The spelling of 251862242 in words is "two hundred fifty-one million, eight hundred sixty-two thousand, two hundred forty-two".