213711187642 has 24 divisors (see below), whose sum is σ = 332147868156. Its totient is φ = 103125585024.

The previous prime is 213711187637. The next prime is 213711187681. The reversal of 213711187642 is 246781117312.

It can be written as a sum of positive squares in 6 ways, for example, as 112185473481 + 101525714161 = 334941^2 + 318631^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3971388 + ... + 4024840.

Almost surely, 2^213711187642 is an apocalyptic number.

213711187642 is a deficient number, since it is larger than the sum of its proper divisors (118436680514).

213711187642 is a wasteful number, since it uses less digits than its factorization.

213711187642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55890 (or 55861 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The spelling of 213711187642 in words is "two hundred thirteen billion, seven hundred eleven million, one hundred eighty-seven thousand, six hundred forty-two".