213149061 has 12 divisors (see below), whose sum is σ = 311057292. Its totient is φ = 140633856.

The previous prime is 213149051. The next prime is 213149129. The reversal of 213149061 is 160941312.

It can be written as a sum of positive squares in 2 ways, for example, as 174398436 + 38750625 = 13206^2 + 6225^2 .

It is not a de Polignac number, because 213149061 - 2¹⁸ = 212886917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213149021) 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 11 ways as a sum of consecutive naturals, for example, 121206 + ... + 122951.

It is an arithmetic number, because the mean of its divisors is an integer number (25921441).

Almost surely, 2^213149061 is an apocalyptic number.

It is an amenable number.

213149061 is a deficient number, since it is larger than the sum of its proper divisors (97908231).

213149061 is a wasteful number, since it uses less digits than its factorization.

213149061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244260 (or 244257 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 213149061 is about 14599.6253719060. The cubic root of 213149061 is about 597.3485418760.

The spelling of 213149061 in words is "two hundred thirteen million, one hundred forty-nine thousand, sixty-one".