55242307 has 4 divisors (see below), whose sum is σ = 55664136. Its totient is φ = 54820480.

The previous prime is 55242301. The next prime is 55242311. The reversal of 55242307 is 70324255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70324255 = 5 ⋅14064851.

It is a cyclic number.

It is not a de Polignac number, because 55242307 - 2²³ = 46853699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55242301) 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, 210718 + ... + 210979.

It is an arithmetic number, because the mean of its divisors is an integer number (13916034).

Almost surely, 2^55242307 is an apocalyptic number.

55242307 is a deficient number, since it is larger than the sum of its proper divisors (421829).

55242307 is a wasteful number, since it uses less digits than its factorization.

55242307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421828.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 55242307 is about 7432.5168684639. The cubic root of 55242307 is about 380.8529018839.

The spelling of 55242307 in words is "fifty-five million, two hundred forty-two thousand, three hundred seven".