55031761 has 4 divisors (see below), whose sum is σ = 55209024. Its totient is φ = 54854500.

The previous prime is 55031759. The next prime is 55031777. The reversal of 55031761 is 16713055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16713055 = 5 ⋅3342611.

It is a cyclic number.

It is not a de Polignac number, because 55031761 - 2¹ = 55031759 is a prime.

It is a super-2 number, since 2×55031761² = 6056989437522242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55031731) 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, 88165 + ... + 88786.

It is an arithmetic number, because the mean of its divisors is an integer number (13802256).

Almost surely, 2^55031761 is an apocalyptic number.

It is an amenable number.

55031761 is a deficient number, since it is larger than the sum of its proper divisors (177263).

55031761 is a wasteful number, since it uses less digits than its factorization.

55031761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177262.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 55031761 is about 7418.3395042287. The cubic root of 55031761 is about 380.3684353673.

The spelling of 55031761 in words is "fifty-five million, thirty-one thousand, seven hundred sixty-one".