55630207 has 4 divisors (see below), whose sum is σ = 57548520. Its totient is φ = 53711896.

The previous prime is 55630199. The next prime is 55630217. The reversal of 55630207 is 70203655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70203655 = 5 ⋅14040731.

It is a cyclic number.

It is not a de Polignac number, because 55630207 - 2³ = 55630199 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 (55630217) 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, 959113 + ... + 959170.

It is an arithmetic number, because the mean of its divisors is an integer number (14387130).

Almost surely, 2^55630207 is an apocalyptic number.

55630207 is a deficient number, since it is larger than the sum of its proper divisors (1918313).

55630207 is a wasteful number, since it uses less digits than its factorization.

55630207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918312.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 55630207 is about 7458.5660149924. The cubic root of 55630207 is about 381.7422468332.

The spelling of 55630207 in words is "fifty-five million, six hundred thirty thousand, two hundred seven".