5531138 has 6 divisors (see below), whose sum is σ = 8301699. Its totient is φ = 2763906.

The previous prime is 5531131. The next prime is 5531143. The reversal of 5531138 is 8311355.

It can be written as a sum of positive squares in only one way, i.e., 2765569 + 2765569 = 1663^2 + 1663^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1663.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5531131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2495 + ... + 4157.

Almost surely, 2^5531138 is an apocalyptic number.

5531138 is a deficient number, since it is larger than the sum of its proper divisors (2770561).

5531138 is an frugal number, since it uses more digits than its factorization.

5531138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328 (or 1665 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 5531138 is about 2351.8371542265. The cubic root of 5531138 is about 176.8499052079.

Multiplying 5531138 by its product of digits (1800), we get a square (9956048400 = 99780²).

The spelling of 5531138 in words is "five million, five hundred thirty-one thousand, one hundred thirty-eight".