202021542 has 12 divisors (see below), whose sum is σ = 437713380. Its totient is φ = 67340508.

The previous prime is 202021529. The next prime is 202021543. The reversal of 202021542 is 245120202.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11223419 = 202021542 / (2 + 0 + 2 + 0 + 2 + 1 + 5 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5611692 + ... + 5611727.

It is an arithmetic number, because the mean of its divisors is an integer number (36476115).

Almost surely, 2^202021542 is an apocalyptic number.

202021542 is an abundant number, since it is smaller than the sum of its proper divisors (235691838).

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

202021542 is a wasteful number, since it uses less digits than its factorization.

202021542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11223427 (or 11223424 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 202021542 is about 14213.4282282636. The cubic root of 202021542 is about 586.7672876798.

Adding to 202021542 its reverse (245120202), we get a palindrome (447141744).

The spelling of 202021542 in words is "two hundred two million, twenty-one thousand, five hundred forty-two".