55442031 has 16 divisors (see below), whose sum is σ = 75796608. Its totient is φ = 36036000.

The previous prime is 55442017. The next prime is 55442033. The reversal of 55442031 is 13024455.

It is not a de Polignac number, because 55442031 - 2¹⁴ = 55425647 is a prime.

It is a super-2 number, since 2×55442031² = 6147637602809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55441992 and 55442010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55442033) 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, 18936 + ... + 21666.

It is an arithmetic number, because the mean of its divisors is an integer number (4737288).

Almost surely, 2^55442031 is an apocalyptic number.

55442031 is a deficient number, since it is larger than the sum of its proper divisors (20354577).

55442031 is a wasteful number, since it uses less digits than its factorization.

55442031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55442031 is about 7445.9405718821. The cubic root of 55442031 is about 381.3113305974.

Adding to 55442031 its reverse (13024455), we get a palindrome (68466486).

The spelling of 55442031 in words is "fifty-five million, four hundred forty-two thousand, thirty-one".