202021154 has 4 divisors (see below), whose sum is σ = 303031734. Its totient is φ = 101010576.

The previous prime is 202021151. The next prime is 202021177. The reversal of 202021154 is 451120202.

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., 153091129 + 48930025 = 12373^2 + 6995^2 .

It is not an unprimeable number, because it can be changed into a prime (202021151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505287 + ... + 50505290.

Almost surely, 2^202021154 is an apocalyptic number.

202021154 is a deficient number, since it is larger than the sum of its proper divisors (101010580).

202021154 is a wasteful number, since it uses less digits than its factorization.

202021154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101010579.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 202021154 is about 14213.4145791924. The cubic root of 202021154 is about 586.7669120336.

Adding to 202021154 its reverse (451120202), we get a palindrome (653141356).

The spelling of 202021154 in words is "two hundred two million, twenty-one thousand, one hundred fifty-four".