555155231 has 4 divisors (see below), whose sum is σ = 565629912. Its totient is φ = 544680552.

The previous prime is 555155219. The next prime is 555155257. The reversal of 555155231 is 132551555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132551555 = 5 ⋅26510311.

It is a cyclic number.

It is not a de Polignac number, because 555155231 - 2¹⁰ = 555154207 is a prime.

It is a super-2 number, since 2×555155231² = 616394661013326722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555157231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5237261 + ... + 5237366.

It is an arithmetic number, because the mean of its divisors is an integer number (141407478).

Almost surely, 2^555155231 is an apocalyptic number.

555155231 is a deficient number, since it is larger than the sum of its proper divisors (10474681).

555155231 is a wasteful number, since it uses less digits than its factorization.

555155231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474680.

The product of its digits is 18750, while the sum is 32.

The square root of 555155231 is about 23561.7323429327. The cubic root of 555155231 is about 821.8731869458.

The spelling of 555155231 in words is "five hundred fifty-five million, one hundred fifty-five thousand, two hundred thirty-one".