2553403 has 2 divisors, whose sum is σ = 2553404. Its totient is φ = 2553402.

The previous prime is 2553389. The next prime is 2553409. The reversal of 2553403 is 3043552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2553403 - 2⁵ = 2553371 is a prime.

2553403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2553409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276701 + 1276702.

It is an arithmetic number, because the mean of its divisors is an integer number (1276702).

2^2553403 is an apocalyptic number.

2553403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2553403 is an equidigital number, since it uses as much as digits as its factorization.

2553403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 2553403 is about 1597.9371076485. The cubic root of 2553403 is about 136.6804672428.

Adding to 2553403 its reverse (3043552), we get a palindrome (5596955).

The spelling of 2553403 in words is "two million, five hundred fifty-three thousand, four hundred three".