55151533 has 4 divisors (see below), whose sum is σ = 57053340. Its totient is φ = 53249728.

The previous prime is 55151527. The next prime is 55151549. The reversal of 55151533 is 33515155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16176484 + 38975049 = 4022^2 + 6243^2 .

It is a cyclic number.

It is not a de Polignac number, because 55151533 - 2⁵ = 55151501 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 (55151513) 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, 950860 + ... + 950917.

It is an arithmetic number, because the mean of its divisors is an integer number (14263335).

Almost surely, 2^55151533 is an apocalyptic number.

It is an amenable number.

55151533 is a deficient number, since it is larger than the sum of its proper divisors (1901807).

55151533 is a wasteful number, since it uses less digits than its factorization.

55151533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901806.

The product of its digits is 5625, while the sum is 28.

The square root of 55151533 is about 7426.4078126642. The cubic root of 55151533 is about 380.6441820551.

Adding to 55151533 its reverse (33515155), we get a palindrome (88666688).

The spelling of 55151533 in words is "fifty-five million, one hundred fifty-one thousand, five hundred thirty-three".