55136797 has 4 divisors (see below), whose sum is σ = 58380156. Its totient is φ = 51893440.

The previous prime is 55136789. The next prime is 55136813. The reversal of 55136797 is 79763155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49477156 + 5659641 = 7034^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 55136797 - 2³ = 55136789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55136717) 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, 1621654 + ... + 1621687.

It is an arithmetic number, because the mean of its divisors is an integer number (14595039).

Almost surely, 2^55136797 is an apocalyptic number.

It is an amenable number.

55136797 is a deficient number, since it is larger than the sum of its proper divisors (3243359).

55136797 is a wasteful number, since it uses less digits than its factorization.

55136797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243358.

The product of its digits is 198450, while the sum is 43.

The square root of 55136797 is about 7425.4156112638. The cubic root of 55136797 is about 380.6102774532.

The spelling of 55136797 in words is "fifty-five million, one hundred thirty-six thousand, seven hundred ninety-seven".