55550031 has 16 divisors (see below), whose sum is σ = 75148800. Its totient is φ = 36496800.

The previous prime is 55550029. The next prime is 55550041. The reversal of 55550031 is 13005555.

It is not a de Polignac number, because 55550031 - 2¹ = 55550029 is a prime.

It is a super-2 number, since 2×55550031² = 6171611888201922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55549983 and 55550010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67086 + ... + 67908.

It is an arithmetic number, because the mean of its divisors is an integer number (4696800).

Almost surely, 2^55550031 is an apocalyptic number.

55550031 is a deficient number, since it is larger than the sum of its proper divisors (19598769).

55550031 is a wasteful number, since it uses less digits than its factorization.

55550031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 55550031 is about 7453.1893173325. The cubic root of 55550031 is about 381.5587656903.

Adding to 55550031 its reverse (13005555), we get a palindrome (68555586).

The spelling of 55550031 in words is "fifty-five million, five hundred fifty thousand, thirty-one".