2421553403 has 4 divisors (see below), whose sum is σ = 2424127728. Its totient is φ = 2418979080.

The previous prime is 2421553369. The next prime is 2421553451. The reversal of 2421553403 is 3043551242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2421553403 - 2⁶ = 2421553339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421553103) 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, 1285751 + ... + 1287632.

It is an arithmetic number, because the mean of its divisors is an integer number (606031932).

Almost surely, 2^2421553403 is an apocalyptic number.

2421553403 is a deficient number, since it is larger than the sum of its proper divisors (2574325).

2421553403 is an equidigital number, since it uses as much as digits as its factorization.

2421553403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574324.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2421553403 is about 49209.2816753100. The cubic root of 2421553403 is about 1342.8618946290.

The spelling of 2421553403 in words is "two billion, four hundred twenty-one million, five hundred fifty-three thousand, four hundred three".