551012403 has 16 divisors (see below), whose sum is σ = 768142080. Its totient is φ = 350675424.

The previous prime is 551012401. The next prime is 551012417. The reversal of 551012403 is 304210155.

It is not a de Polignac number, because 551012403 - 2¹ = 551012401 is a prime.

It is a super-2 number, since 2×551012403² = 607229336519668818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551012403.

It is not an unprimeable number, because it can be changed into a prime (551012401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28453 + ... + 43721.

It is an arithmetic number, because the mean of its divisors is an integer number (48008880).

Almost surely, 2^551012403 is an apocalyptic number.

551012403 is a deficient number, since it is larger than the sum of its proper divisors (217129677).

551012403 is a wasteful number, since it uses less digits than its factorization.

551012403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15818.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 551012403 is about 23473.6533799066. The cubic root of 551012403 is about 819.8236796187.

Adding to 551012403 its reverse (304210155), we get a palindrome (855222558).

The spelling of 551012403 in words is "five hundred fifty-one million, twelve thousand, four hundred three".