55771499 has 4 divisors (see below), whose sum is σ = 63738864. Its totient is φ = 47804136.

The previous prime is 55771483. The next prime is 55771519. The reversal of 55771499 is 99417755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99417755 = 5 ⋅19883551.

It is a cyclic number.

It is not a de Polignac number, because 55771499 - 2⁴ = 55771483 is a prime.

It is a super-2 number, since 2×55771499² = 6220920201414002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55771409) 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, 3983672 + ... + 3983685.

It is an arithmetic number, because the mean of its divisors is an integer number (15934716).

Almost surely, 2^55771499 is an apocalyptic number.

55771499 is a deficient number, since it is larger than the sum of its proper divisors (7967365).

55771499 is an equidigital number, since it uses as much as digits as its factorization.

55771499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967364.

The product of its digits is 396900, while the sum is 47.

The square root of 55771499 is about 7468.0318022890. The cubic root of 55771499 is about 382.0651620791.

The spelling of 55771499 in words is "fifty-five million, seven hundred seventy-one thousand, four hundred ninety-nine".