55066531 has 16 divisors (see below), whose sum is σ = 63334656. Its totient is φ = 47478816.

The previous prime is 55066507. The next prime is 55066537. The reversal of 55066531 is 13566055.

It is a cyclic number.

It is not a de Polignac number, because 55066531 - 2⁵ = 55066499 is a prime.

It is a super-2 number, since 2×55066531² = 6064645672747922, 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 = 55066493 and 55066502.

It is not an unprimeable number, because it can be changed into a prime (55066537) 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, 10716 + ... + 14998.

It is an arithmetic number, because the mean of its divisors is an integer number (3958416).

Almost surely, 2^55066531 is an apocalyptic number.

55066531 is a deficient number, since it is larger than the sum of its proper divisors (8268125).

55066531 is a wasteful number, since it uses less digits than its factorization.

55066531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 55066531 is about 7420.6826505383. The cubic root of 55066531 is about 380.4485262451.

It can be divided in two parts, 550 and 66531, that added together give a square (67081 = 259²).

The spelling of 55066531 in words is "fifty-five million, sixty-six thousand, five hundred thirty-one".