55553131 has 8 divisors (see below), whose sum is σ = 59058000. Its totient is φ = 52106400.

The previous prime is 55553129. The next prime is 55553143. The reversal of 55553131 is 13135555.

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 55553131 - 2¹ = 55553129 is a prime.

It is a super-2 number, since 2×55553131² = 6172300727806322, 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 55553131.

It is not an unprimeable number, because it can be changed into a prime (55553231) 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, 12556 + ... + 16393.

It is an arithmetic number, because the mean of its divisors is an integer number (7382250).

Almost surely, 2^55553131 is an apocalyptic number.

55553131 is a deficient number, since it is larger than the sum of its proper divisors (3504869).

55553131 is a wasteful number, since it uses less digits than its factorization.

55553131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29069.

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

The square root of 55553131 is about 7453.3972790936. The cubic root of 55553131 is about 381.5658632571.

Adding to 55553131 its reverse (13135555), we get a palindrome (68688686).

The spelling of 55553131 in words is "fifty-five million, five hundred fifty-three thousand, one hundred thirty-one".