205013131035455 has 16 divisors (see below), whose sum is σ = 247047345100800. Its totient is φ = 163322791998240.

The previous prime is 205013131035409. The next prime is 205013131035463. The reversal of 205013131035455 is 554530131310502.

It is not a de Polignac number, because 205013131035455 - 2²⁶ = 205013063926591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142554266 + ... + 143985224.

It is an arithmetic number, because the mean of its divisors is an integer number (15440459068800).

Almost surely, 2^{205013131035455} is an apocalyptic number.

205013131035455 is a deficient number, since it is larger than the sum of its proper divisors (42034214065345).

205013131035455 is a wasteful number, since it uses less digits than its factorization.

205013131035455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551094.

The product of its (nonzero) digits is 135000, while the sum is 38.

Adding to 205013131035455 its reverse (554530131310502), we get a palindrome (759543262345957).

The spelling of 205013131035455 in words is "two hundred five trillion, thirteen billion, one hundred thirty-one million, thirty-five thousand, four hundred fifty-five".