205311470364542 has 4 divisors (see below), whose sum is σ = 307967205546816. Its totient is φ = 102655735182270.

The previous prime is 205311470364523. The next prime is 205311470364547. The reversal of 205311470364542 is 245463074113502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205311470364547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51327867591134 + ... + 51327867591137.

It is an arithmetic number, because the mean of its divisors is an integer number (76991801386704).

Almost surely, 2^{205311470364542} is an apocalyptic number.

205311470364542 is a deficient number, since it is larger than the sum of its proper divisors (102655735182274).

205311470364542 is a wasteful number, since it uses less digits than its factorization.

205311470364542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102655735182273.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 205311470364542 in words is "two hundred five trillion, three hundred eleven billion, four hundred seventy million, three hundred sixty-four thousand, five hundred forty-two".