55097986 has 36 divisors (see below), whose sum is σ = 93755718. Its totient is φ = 24197184.

The previous prime is 55097983. The next prime is 55097989. The reversal of 55097986 is 68979055.

It is an interprime number because it is at equal distance from previous prime (55097983) and next prime (55097989).

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 14584761 = 6365^2 + 3819^2 .

It is a super-2 number, since 2×55097986² = 6071576122512392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55097981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 822325 + ... + 822391.

Almost surely, 2^55097986 is an apocalyptic number.

55097986 is a deficient number, since it is larger than the sum of its proper divisors (38657732).

55097986 is a wasteful number, since it uses less digits than its factorization.

55097986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 55097986 is about 7422.8017621381. The cubic root of 55097986 is about 380.5209521531.

The spelling of 55097986 in words is "fifty-five million, ninety-seven thousand, nine hundred eighty-six".