55977207 has 16 divisors (see below), whose sum is σ = 87685248. Its totient is φ = 31315680.

The previous prime is 55977197. The next prime is 55977269. The reversal of 55977207 is 70277955.

It is not a de Polignac number, because 55977207 - 2¹⁰ = 55976183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64813 + ... + 65670.

It is an arithmetic number, because the mean of its divisors is an integer number (5480328).

Almost surely, 2^55977207 is an apocalyptic number.

55977207 is a deficient number, since it is larger than the sum of its proper divisors (31708041).

55977207 is a wasteful number, since it uses less digits than its factorization.

55977207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130510.

The product of its (nonzero) digits is 154350, while the sum is 42.

The square root of 55977207 is about 7481.7916971806. The cubic root of 55977207 is about 382.5343230339.

The spelling of 55977207 in words is "fifty-five million, nine hundred seventy-seven thousand, two hundred seven".