211140625203461 has 4 divisors (see below), whose sum is σ = 211288379316300. Its totient is φ = 210992871090624.

The previous prime is 211140625203437. The next prime is 211140625203499. The reversal of 211140625203461 is 164302526041112.

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 100036503330625 + 111104121872836 = 10001825^2 + 10540594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211140625203461 is a prime.

It is a super-2 number, since 2×211140625203461² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211140625202461) 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, 73877054276 + ... + 73877057133.

It is an arithmetic number, because the mean of its divisors is an integer number (52822094829075).

Almost surely, 2^{211140625203461} is an apocalyptic number.

It is an amenable number.

211140625203461 is a deficient number, since it is larger than the sum of its proper divisors (147754112839).

211140625203461 is a wasteful number, since it uses less digits than its factorization.

211140625203461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147754112838.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 211140625203461 in words is "two hundred eleven trillion, one hundred forty billion, six hundred twenty-five million, two hundred three thousand, four hundred sixty-one".