205430551300542 has 32 divisors (see below), whose sum is σ = 412325680398624. Its totient is φ = 68232757017600.

The previous prime is 205430551300493. The next prime is 205430551300543. The reversal of 205430551300542 is 245003155034502.

It is a super-2 number, since 2×205430551300542² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205430551300542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205430551300543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456615408 + ... + 457065084.

It is an arithmetic number, because the mean of its divisors is an integer number (12885177512457).

Almost surely, 2^{205430551300542} is an apocalyptic number.

205430551300542 is an abundant number, since it is smaller than the sum of its proper divisors (206895129098082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205430551300542 is a wasteful number, since it uses less digits than its factorization.

205430551300542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720924.

The product of its (nonzero) digits is 360000, while the sum is 39.

The spelling of 205430551300542 in words is "two hundred five trillion, four hundred thirty billion, five hundred fifty-one million, three hundred thousand, five hundred forty-two".