251849140 has 12 divisors (see below), whose sum is σ = 528883236. Its totient is φ = 100739648.

The previous prime is 251849131. The next prime is 251849167. The reversal of 251849140 is 41948152.

It is a happy number.

251849140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104080804 + 147768336 = 10202^2 + 12156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 251849096 and 251849105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6296209 + ... + 6296248.

It is an arithmetic number, because the mean of its divisors is an integer number (44073603).

Almost surely, 2^251849140 is an apocalyptic number.

251849140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251849140 is an abundant number, since it is smaller than the sum of its proper divisors (277034096).

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

251849140 is a wasteful number, since it uses less digits than its factorization.

251849140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592466 (or 12592464 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 251849140 is about 15869.7555116643. The cubic root of 251849140 is about 631.5098914825.

The spelling of 251849140 in words is "two hundred fifty-one million, eight hundred forty-nine thousand, one hundred forty".