55553397 has 16 divisors (see below), whose sum is σ = 79296000. Its totient is φ = 34489584.

The previous prime is 55553387. The next prime is 55553413. The reversal of 55553397 is 79335555.

It is not a de Polignac number, because 55553397 - 2⁷ = 55553269 is a prime.

It is a super-3 number, since 3×55553397³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55553327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4897 + ... + 11622.

It is an arithmetic number, because the mean of its divisors is an integer number (4956000).

Almost surely, 2^55553397 is an apocalyptic number.

55553397 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55553397 is a deficient number, since it is larger than the sum of its proper divisors (23742603).

55553397 is a wasteful number, since it uses less digits than its factorization.

55553397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16600.

The product of its digits is 354375, while the sum is 42.

The square root of 55553397 is about 7453.4151232841. The cubic root of 55553397 is about 381.5664722619.

The spelling of 55553397 in words is "fifty-five million, five hundred fifty-three thousand, three hundred ninety-seven".