235481221 has 2 divisors, whose sum is σ = 235481222. Its totient is φ = 235481220.

The previous prime is 235481179. The next prime is 235481237. The reversal of 235481221 is 122184532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199120321 + 36360900 = 14111^2 + 6030^2 .

It is a cyclic number.

It is not a de Polignac number, because 235481221 - 2²⁷ = 101263493 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 235481221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235481251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117740610 + 117740611.

It is an arithmetic number, because the mean of its divisors is an integer number (117740611).

Almost surely, 2^235481221 is an apocalyptic number.

It is an amenable number.

235481221 is a deficient number, since it is larger than the sum of its proper divisors (1).

235481221 is an equidigital number, since it uses as much as digits as its factorization.

235481221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 235481221 is about 15345.3973881422. The cubic root of 235481221 is about 617.5215144367.

The spelling of 235481221 in words is "two hundred thirty-five million, four hundred eighty-one thousand, two hundred twenty-one".