235434520421 has 4 divisors (see below), whose sum is σ = 238271080992. Its totient is φ = 232597959852.

The previous prime is 235434520417. The next prime is 235434520427. The reversal of 235434520421 is 124025434532.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 235434520421 - 2² = 235434520417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235434520427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418280161 + ... + 1418280326.

It is an arithmetic number, because the mean of its divisors is an integer number (59567770248).

Almost surely, 2^235434520421 is an apocalyptic number.

It is an amenable number.

235434520421 is a deficient number, since it is larger than the sum of its proper divisors (2836560571).

235434520421 is an equidigital number, since it uses as much as digits as its factorization.

235434520421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836560570.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 235434520421 its reverse (124025434532), we get a palindrome (359459954953).

The spelling of 235434520421 in words is "two hundred thirty-five billion, four hundred thirty-four million, five hundred twenty thousand, four hundred twenty-one".