55113031 has 4 divisors (see below), whose sum is σ = 58354992. Its totient is φ = 51871072.

The previous prime is 55113013. The next prime is 55113041. The reversal of 55113031 is 13031155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13031155 = 5 ⋅2606231.

It is a cyclic number.

It is not a de Polignac number, because 55113031 - 2¹³ = 55104839 is a prime.

It is a super-2 number, since 2×55113031² = 6074892372013922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55113041) 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, 1620955 + ... + 1620988.

It is an arithmetic number, because the mean of its divisors is an integer number (14588748).

Almost surely, 2^55113031 is an apocalyptic number.

55113031 is a deficient number, since it is larger than the sum of its proper divisors (3241961).

55113031 is a wasteful number, since it uses less digits than its factorization.

55113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241960.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 55113031 is about 7423.8151243145. The cubic root of 55113031 is about 380.5555838891. Note that the first 4 decimals are identical.

Adding to 55113031 its reverse (13031155), we get a palindrome (68144186).

The spelling of 55113031 in words is "fifty-five million, one hundred thirteen thousand, thirty-one".