55133357 has 4 divisors (see below), whose sum is σ = 55158336. Its totient is φ = 55108380.

The previous prime is 55133347. The next prime is 55133371. The reversal of 55133357 is 75333155.

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.

It is a cyclic number.

It is not a de Polignac number, because 55133357 - 2⁴ = 55133341 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 (55133347) 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, 8819 + ... + 13712.

It is an arithmetic number, because the mean of its divisors is an integer number (13789584).

Almost surely, 2^55133357 is an apocalyptic number.

It is an amenable number.

55133357 is a deficient number, since it is larger than the sum of its proper divisors (24979).

55133357 is a wasteful number, since it uses less digits than its factorization.

55133357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24978.

The product of its digits is 23625, while the sum is 32.

The square root of 55133357 is about 7425.1839707848. The cubic root of 55133357 is about 380.6023618285.

The spelling of 55133357 in words is "fifty-five million, one hundred thirty-three thousand, three hundred fifty-seven".