5155551 has 12 divisors (see below), whose sum is σ = 7466680. Its totient is φ = 3427920.

The previous prime is 5155547. The next prime is 5155561. The reversal of 5155551 is 1555515.

It is not a de Polignac number, because 5155551 - 2² = 5155547 is a prime.

It is a super-2 number, since 2×5155551² = 53159412227202, which contains 22 as substring.

It is a Duffinian number.

5155551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5155511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5805 + ... + 6633.

Almost surely, 2^5155551 is an apocalyptic number.

5155551 is a deficient number, since it is larger than the sum of its proper divisors (2311129).

5155551 is a wasteful number, since it uses less digits than its factorization.

5155551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1523 counting only the distinct ones).

The product of its digits is 3125, while the sum is 27.

The square root of 5155551 is about 2270.5838456221. The cubic root of 5155551 is about 172.7527737133.

The spelling of 5155551 in words is "five million, one hundred fifty-five thousand, five hundred fifty-one".