202521134142 has 64 divisors (see below), whose sum is σ = 462304929600. Its totient is φ = 65669097600.

The previous prime is 202521134111. The next prime is 202521134143. The reversal of 202521134142 is 241431125202.

202521134142 is a `hidden beast` number, since 2 + 0 + 2 + 521 + 134 + 1 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202521134143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15779784 + ... + 15792612.

It is an arithmetic number, because the mean of its divisors is an integer number (7223514525).

Almost surely, 2^202521134142 is an apocalyptic number.

202521134142 is an abundant number, since it is smaller than the sum of its proper divisors (259783795458).

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

202521134142 is a wasteful number, since it uses less digits than its factorization.

202521134142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778 (or 20772 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 202521134142 its reverse (241431125202), we get a palindrome (443952259344).

The spelling of 202521134142 in words is "two hundred two billion, five hundred twenty-one million, one hundred thirty-four thousand, one hundred forty-two".