551216445 has 32 divisors (see below), whose sum is σ = 951979392. Its totient is φ = 270742272.

The previous prime is 551216431. The next prime is 551216447. The reversal of 551216445 is 544612155.

It is not a de Polignac number, because 551216445 - 2²¹ = 549119293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551216447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88039 + ... + 94091.

It is an arithmetic number, because the mean of its divisors is an integer number (29749356).

Almost surely, 2^551216445 is an apocalyptic number.

It is an amenable number.

551216445 is a deficient number, since it is larger than the sum of its proper divisors (400762947).

551216445 is a wasteful number, since it uses less digits than its factorization.

551216445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541.

The product of its digits is 24000, while the sum is 33.

The square root of 551216445 is about 23477.9991694352. Note that the first 3 decimals coincide. The cubic root of 551216445 is about 819.9248617449.

The spelling of 551216445 in words is "five hundred fifty-one million, two hundred sixteen thousand, four hundred forty-five".