212555131 has 4 divisors (see below), whose sum is σ = 225058392. Its totient is φ = 200051872.

The previous prime is 212555129. The next prime is 212555153. The reversal of 212555131 is 131555212.

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

It is a cyclic number.

It is not a de Polignac number, because 212555131 - 2¹ = 212555129 is a prime.

It is a super-2 number, since 2×212555131² = 90359367428854322, 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 = 212555096 and 212555105.

It is not an unprimeable number, because it can be changed into a prime (212556131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6251605 + ... + 6251638.

It is an arithmetic number, because the mean of its divisors is an integer number (56264598).

Almost surely, 2^212555131 is an apocalyptic number.

212555131 is a deficient number, since it is larger than the sum of its proper divisors (12503261).

212555131 is a wasteful number, since it uses less digits than its factorization.

212555131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12503260.

The product of its digits is 1500, while the sum is 25.

The square root of 212555131 is about 14579.2705921798. The cubic root of 212555131 is about 596.7931977146.

The spelling of 212555131 in words is "two hundred twelve million, five hundred fifty-five thousand, one hundred thirty-one".