251893 has 2 divisors, whose sum is σ = 251894. Its totient is φ = 251892.

The previous prime is 251887. The next prime is 251897. The reversal of 251893 is 398152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228484 + 23409 = 478^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 251893 - 2⁵ = 251861 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125946 + 125947.

It is an arithmetic number, because the mean of its divisors is an integer number (125947).

2²⁵¹⁸⁹³ is an apocalyptic number.

It is an amenable number.

251893 is a deficient number, since it is larger than the sum of its proper divisors (1).

251893 is an equidigital number, since it uses as much as digits as its factorization.

251893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 251893 is about 501.8894300541. The cubic root of 251893 is about 63.1546548898.

The spelling of 251893 in words is "two hundred fifty-one thousand, eight hundred ninety-three".