55740031 has 4 divisors (see below), whose sum is σ = 56653864. Its totient is φ = 54826200.

The previous prime is 55740029. The next prime is 55740037. The reversal of 55740031 is 13004755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13004755 = 5 ⋅2600951.

It is a cyclic number.

It is not a de Polignac number, because 55740031 - 2¹ = 55740029 is a prime.

It is a super-2 number, since 2×55740031² = 6213902111761922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55739978 and 55740005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55740037) 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, 456825 + ... + 456946.

It is an arithmetic number, because the mean of its divisors is an integer number (14163466).

Almost surely, 2^55740031 is an apocalyptic number.

55740031 is a deficient number, since it is larger than the sum of its proper divisors (913833).

55740031 is an equidigital number, since it uses as much as digits as its factorization.

55740031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913832.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 55740031 is about 7465.9246580715. The cubic root of 55740031 is about 381.9932909104.

Adding to 55740031 its reverse (13004755), we get a palindrome (68744786).

The spelling of 55740031 in words is "fifty-five million, seven hundred forty thousand, thirty-one".