251473 has 2 divisors, whose sum is σ = 251474. Its totient is φ = 251472.

The previous prime is 251467. The next prime is 251477. The reversal of 251473 is 374152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242064 + 9409 = 492^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 251473 - 2¹⁷ = 120401 is a prime.

It is not a weakly prime, because it can be changed into another prime (251477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125736 + 125737.

It is an arithmetic number, because the mean of its divisors is an integer number (125737).

2²⁵¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

251473 is a deficient number, since it is larger than the sum of its proper divisors (1).

251473 is an equidigital number, since it uses as much as digits as its factorization.

251473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 251473 is about 501.4708366396. The cubic root of 251473 is about 63.1195345397.

The spelling of 251473 in words is "two hundred fifty-one thousand, four hundred seventy-three".