55191533 has 8 divisors (see below), whose sum is σ = 56340480. Its totient is φ = 54054000.

The previous prime is 55191527. The next prime is 55191547. The reversal of 55191533 is 33519155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55191533 - 2¹⁸ = 54929389 is a prime.

It is a super-2 number, since 2×55191533² = 6092210629780178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55191533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55191593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7283 + ... + 12783.

It is an arithmetic number, because the mean of its divisors is an integer number (7042560).

Almost surely, 2^55191533 is an apocalyptic number.

It is an amenable number.

55191533 is a deficient number, since it is larger than the sum of its proper divisors (1148947).

55191533 is a wasteful number, since it uses less digits than its factorization.

55191533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707.

The product of its digits is 10125, while the sum is 32.

The square root of 55191533 is about 7429.1004166050. The cubic root of 55191533 is about 380.7361836550.

The spelling of 55191533 in words is "fifty-five million, one hundred ninety-one thousand, five hundred thirty-three".