212140261541 has 4 divisors (see below), whose sum is σ = 228458743212. Its totient is φ = 195821779872.

The previous prime is 212140261481. The next prime is 212140261547. The reversal of 212140261541 is 145162041212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76479902500 + 135660359041 = 276550^2 + 368321^2 .

It is a cyclic number.

It is not a de Polignac number, because 212140261541 - 2²² = 212136067237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212140261547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8159240816 + ... + 8159240841.

It is an arithmetic number, because the mean of its divisors is an integer number (57114685803).

Almost surely, 2^212140261541 is an apocalyptic number.

It is an amenable number.

212140261541 is a deficient number, since it is larger than the sum of its proper divisors (16318481671).

212140261541 is a wasteful number, since it uses less digits than its factorization.

212140261541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16318481670.

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 212140261541 in words is "two hundred twelve billion, one hundred forty million, two hundred sixty-one thousand, five hundred forty-one".