55533197 has 2 divisors, whose sum is σ = 55533198. Its totient is φ = 55533196.

The previous prime is 55533193. The next prime is 55533221. The reversal of 55533197 is 79133555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28793956 + 26739241 = 5366^2 + 5171^2 .

It is a cyclic number.

It is not a de Polignac number, because 55533197 - 2² = 55533193 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55533197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55533193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766598 + 27766599.

It is an arithmetic number, because the mean of its divisors is an integer number (27766599).

Almost surely, 2^55533197 is an apocalyptic number.

It is an amenable number.

55533197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55533197 is an equidigital number, since it uses as much as digits as its factorization.

55533197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70875, while the sum is 38.

The square root of 55533197 is about 7452.0599165600. The cubic root of 55533197 is about 381.5202190020.

The spelling of 55533197 in words is "fifty-five million, five hundred thirty-three thousand, one hundred ninety-seven".