205251452542 has 8 divisors (see below), whose sum is σ = 315037113336. Its totient is φ = 100239081432.

The previous prime is 205251452519. The next prime is 205251452543. The reversal of 205251452542 is 245254152502.

205251452542 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205251452543) 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, 1193322313 + ... + 1193322484.

It is an arithmetic number, because the mean of its divisors is an integer number (39379639167).

Almost surely, 2^205251452542 is an apocalyptic number.

205251452542 is a deficient number, since it is larger than the sum of its proper divisors (109785660794).

205251452542 is a wasteful number, since it uses less digits than its factorization.

205251452542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386644842.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 205251452542 in words is "two hundred five billion, two hundred fifty-one million, four hundred fifty-two thousand, five hundred forty-two".