55570031 has 4 divisors (see below), whose sum is σ = 60621864. Its totient is φ = 50518200.

The previous prime is 55570019. The next prime is 55570043. The reversal of 55570031 is 13007555.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55570019) and next prime (55570043).

It is a cyclic number.

It is not a de Polignac number, because 55570031 - 2¹⁸ = 55307887 is a prime.

It is a super-2 number, since 2×55570031² = 6176056690681922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55570051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525900 + ... + 2525921.

It is an arithmetic number, because the mean of its divisors is an integer number (15155466).

Almost surely, 2^55570031 is an apocalyptic number.

55570031 is a deficient number, since it is larger than the sum of its proper divisors (5051833).

55570031 is a wasteful number, since it uses less digits than its factorization.

55570031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051832.

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 55570031 is about 7454.5309040878. The cubic root of 55570031 is about 381.6045518014.

Adding to 55570031 its reverse (13007555), we get a palindrome (68577586).

The spelling of 55570031 in words is "fifty-five million, five hundred seventy thousand, thirty-one".