55187269 has 2 divisors, whose sum is σ = 55187270. Its totient is φ = 55187268.

The previous prime is 55187263. The next prime is 55187273. The reversal of 55187269 is 96278155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55130625 + 56644 = 7425^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 55187269 - 2⁷ = 55187141 is a prime.

It is a super-2 number, since 2×55187269² = 6091269319356722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55187263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27593634 + 27593635.

It is an arithmetic number, because the mean of its divisors is an integer number (27593635).

Almost surely, 2^55187269 is an apocalyptic number.

It is an amenable number.

55187269 is a deficient number, since it is larger than the sum of its proper divisors (1).

55187269 is an equidigital number, since it uses as much as digits as its factorization.

55187269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 55187269 is about 7428.8134314977. The cubic root of 55187269 is about 380.7263784016.

The spelling of 55187269 in words is "fifty-five million, one hundred eighty-seven thousand, two hundred sixty-nine".