55097906 has 4 divisors (see below), whose sum is σ = 82646862. Its totient is φ = 27548952.

The previous prime is 55097879. The next prime is 55097909. The reversal of 55097906 is 60979055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60979055 = 5 ⋅12195811.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 707281 = 7375^2 + 841^2 .

It is not an unprimeable number, because it can be changed into a prime (55097909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13774475 + ... + 13774478.

Almost surely, 2^55097906 is an apocalyptic number.

55097906 is a deficient number, since it is larger than the sum of its proper divisors (27548956).

55097906 is a wasteful number, since it uses less digits than its factorization.

55097906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27548955.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 55097906 is about 7422.7963733353. The cubic root of 55097906 is about 380.5207679861.

The spelling of 55097906 in words is "fifty-five million, ninety-seven thousand, nine hundred six".