55155131 has 2 divisors, whose sum is σ = 55155132. Its totient is φ = 55155130.

The previous prime is 55155109. The next prime is 55155151. The reversal of 55155131 is 13155155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55155131 - 2¹⁰ = 55154107 is a prime.

It is a super-2 number, since 2×55155131² = 6084176951254322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 55155131.

It is not a weakly prime, because it can be changed into another prime (55155101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27577565 + 27577566.

It is an arithmetic number, because the mean of its divisors is an integer number (27577566).

Almost surely, 2^55155131 is an apocalyptic number.

55155131 is a deficient number, since it is larger than the sum of its proper divisors (1).

55155131 is an equidigital number, since it uses as much as digits as its factorization.

55155131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1875, while the sum is 26.

The square root of 55155131 is about 7426.6500523453. The cubic root of 55155131 is about 380.6524594194.

The spelling of 55155131 in words is "fifty-five million, one hundred fifty-five thousand, one hundred thirty-one".