55020031 has 6 divisors (see below), whose sum is σ = 60476696. Its totient is φ = 50018100.

The previous prime is 55020023. The next prime is 55020061. The reversal of 55020031 is 13002055.

It is not a de Polignac number, because 55020031 - 2³ = 55020023 is a prime.

It is a super-2 number, since 2×55020031² = 6054407622481922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 55019987 and 55020014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55020061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227235 + ... + 227476.

Almost surely, 2^55020031 is an apocalyptic number.

55020031 is a deficient number, since it is larger than the sum of its proper divisors (5456665).

55020031 is a wasteful number, since it uses less digits than its factorization.

55020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454733 (or 454722 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 55020031 is about 7417.5488539005. The cubic root of 55020031 is about 380.3414083154.

Adding to 55020031 its reverse (13002055), we get a palindrome (68022086).

The spelling of 55020031 in words is "fifty-five million, twenty thousand, thirty-one".