201255253154042 has 4 divisors (see below), whose sum is σ = 301882879731066. Its totient is φ = 100627626577020.

The previous prime is 201255253153891. The next prime is 201255253154047. The reversal of 201255253154042 is 240451352552102.

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

It can be written as a sum of positive squares in only one way, i.e., 173290606392121 + 27964646761921 = 13163989^2 + 5288161^2 .

It is not an unprimeable number, because it can be changed into a prime (201255253154047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50313813288509 + ... + 50313813288512.

Almost surely, 2^{201255253154042} is an apocalyptic number.

201255253154042 is a deficient number, since it is larger than the sum of its proper divisors (100627626577024).

201255253154042 is a wasteful number, since it uses less digits than its factorization.

201255253154042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100627626577023.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 201255253154042 in words is "two hundred one trillion, two hundred fifty-five billion, two hundred fifty-three million, one hundred fifty-four thousand, forty-two".