55190031 has 16 divisors (see below), whose sum is σ = 79467360. Its totient is φ = 33868800.

The previous prime is 55190029. The next prime is 55190071. The reversal of 55190031 is 13009155.

It is not a de Polignac number, because 55190031 - 2¹ = 55190029 is a prime.

It is a super-2 number, since 2×55190031² = 6091879043561922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55189983 and 55190010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55190021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13875 + ... + 17403.

It is an arithmetic number, because the mean of its divisors is an integer number (4966710).

Almost surely, 2^55190031 is an apocalyptic number.

55190031 is a deficient number, since it is larger than the sum of its proper divisors (24277329).

55190031 is a wasteful number, since it uses less digits than its factorization.

55190031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 55190031 is about 7428.9993269619. Note that the first 3 decimals coincide. The cubic root of 55190031 is about 380.7327297983.

Adding to 55190031 its reverse (13009155), we get a palindrome (68199186).

The spelling of 55190031 in words is "fifty-five million, one hundred ninety thousand, thirty-one".