2135430421 has 4 divisors (see below), whose sum is σ = 2135907072. Its totient is φ = 2134953772.

The previous prime is 2135430413. The next prime is 2135430431. The reversal of 2135430421 is 1240345312.

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 2135430421 - 2³ = 2135430413 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 (2135430431) 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, 231541 + ... + 240586.

It is an arithmetic number, because the mean of its divisors is an integer number (533976768).

Almost surely, 2^2135430421 is an apocalyptic number.

It is an amenable number.

2135430421 is a deficient number, since it is larger than the sum of its proper divisors (476651).

2135430421 is an equidigital number, since it uses as much as digits as its factorization.

2135430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476650.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2135430421 is about 46210.7175988428. The cubic root of 2135430421 is about 1287.7408571417.

Adding to 2135430421 its reverse (1240345312), we get a palindrome (3375775733).

The spelling of 2135430421 in words is "two billion, one hundred thirty-five million, four hundred thirty thousand, four hundred twenty-one".