251145268 has 24 divisors (see below), whose sum is σ = 504695520. Its totient is φ = 108148320.

The previous prime is 251145259. The next prime is 251145269. The reversal of 251145268 is 862541152.

It is a happy number.

251145268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251145269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149371 + ... + 151042.

It is an arithmetic number, because the mean of its divisors is an integer number (21028980).

Almost surely, 2^251145268 is an apocalyptic number.

It is an amenable number.

251145268 is an abundant number, since it is smaller than the sum of its proper divisors (253550252).

251145268 is a wasteful number, since it uses less digits than its factorization.

251145268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300447 (or 300445 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 251145268 is about 15847.5634720294. The cubic root of 251145268 is about 630.9210245718.

The spelling of 251145268 in words is "two hundred fifty-one million, one hundred forty-five thousand, two hundred sixty-eight".