2355623421 has 4 divisors (see below), whose sum is σ = 3140831232. Its totient is φ = 1570415612.

The previous prime is 2355623371. The next prime is 2355623429. The reversal of 2355623421 is 1243265532.

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 2355623421 - 2⁶ = 2355623357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2355623429) 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, 392603901 + ... + 392603906.

It is an arithmetic number, because the mean of its divisors is an integer number (785207808).

Almost surely, 2^2355623421 is an apocalyptic number.

It is an amenable number.

2355623421 is a deficient number, since it is larger than the sum of its proper divisors (785207811).

2355623421 is an equidigital number, since it uses as much as digits as its factorization.

2355623421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785207810.

The product of its digits is 43200, while the sum is 33.

The square root of 2355623421 is about 48534.7650761802. The cubic root of 2355623421 is about 1330.5625262862.

Adding to 2355623421 its reverse (1243265532), we get a palindrome (3598888953).

The spelling of 2355623421 in words is "two billion, three hundred fifty-five million, six hundred twenty-three thousand, four hundred twenty-one".