235515421 has 2 divisors, whose sum is σ = 235515422. Its totient is φ = 235515420.

The previous prime is 235515403. The next prime is 235515443. The reversal of 235515421 is 124515532.

235515421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181198521 + 54316900 = 13461^2 + 7370^2 .

It is a cyclic number.

It is not a de Polignac number, because 235515421 - 2¹¹ = 235513373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 235515421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235515461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117757710 + 117757711.

It is an arithmetic number, because the mean of its divisors is an integer number (117757711).

Almost surely, 2^235515421 is an apocalyptic number.

It is an amenable number.

235515421 is a deficient number, since it is larger than the sum of its proper divisors (1).

235515421 is an equidigital number, since it uses as much as digits as its factorization.

235515421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 235515421 is about 15346.5116883284. The cubic root of 235515421 is about 617.5514081346.

The spelling of 235515421 in words is "two hundred thirty-five million, five hundred fifteen thousand, four hundred twenty-one".