551153503 has 4 divisors (see below), whose sum is σ = 553581720. Its totient is φ = 548725288.

The previous prime is 551153461. The next prime is 551153513. The reversal of 551153503 is 305351155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305351155 = 5 ⋅61070231.

It is a cyclic number.

It is not a de Polignac number, because 551153503 - 2⁹ = 551152991 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 (551153513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213768 + ... + 1214221.

It is an arithmetic number, because the mean of its divisors is an integer number (138395430).

Almost surely, 2^551153503 is an apocalyptic number.

551153503 is a deficient number, since it is larger than the sum of its proper divisors (2428217).

551153503 is a wasteful number, since it uses less digits than its factorization.

551153503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428216.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 551153503 is about 23476.6586847447. The cubic root of 551153503 is about 819.8936521807.

The spelling of 551153503 in words is "five hundred fifty-one million, one hundred fifty-three thousand, five hundred three".