55233397 has 4 divisors (see below), whose sum is σ = 55248480. Its totient is φ = 55218316.

The previous prime is 55233379. The next prime is 55233407. The reversal of 55233397 is 79333255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79333255 = 5 ⋅15866651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55233397 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 (55233317) 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, 1854 + ... + 10672.

It is an arithmetic number, because the mean of its divisors is an integer number (13812120).

Almost surely, 2^55233397 is an apocalyptic number.

It is an amenable number.

55233397 is a deficient number, since it is larger than the sum of its proper divisors (15083).

55233397 is an equidigital number, since it uses as much as digits as its factorization.

55233397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082.

The product of its digits is 85050, while the sum is 37.

The square root of 55233397 is about 7431.9174511024. The cubic root of 55233397 is about 380.8324249343.

The spelling of 55233397 in words is "fifty-five million, two hundred thirty-three thousand, three hundred ninety-seven".