55772137 has 4 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 55660756.

The previous prime is 55772107. The next prime is 55772141. The reversal of 55772137 is 73127755.

55772137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 55772137 - 2⁷ = 55772009 is a prime.

It is a super-2 number, since 2×55772137² = 6221062531093538, 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 = 55772096 and 55772105.

It is not an unprimeable number, because it can be changed into a prime (55772107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54937 + ... + 55942.

It is an arithmetic number, because the mean of its divisors is an integer number (13970880).

Almost surely, 2^55772137 is an apocalyptic number.

It is an amenable number.

55772137 is a deficient number, since it is larger than the sum of its proper divisors (111383).

55772137 is a wasteful number, since it uses less digits than its factorization.

55772137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111382.

The product of its digits is 51450, while the sum is 37.

The square root of 55772137 is about 7468.0745175714. The cubic root of 55772137 is about 382.0666189561.

The spelling of 55772137 in words is "fifty-five million, seven hundred seventy-two thousand, one hundred thirty-seven".