200520154 has 4 divisors (see below), whose sum is σ = 300780234. Its totient is φ = 100260076.

The previous prime is 200520143. The next prime is 200520157. The reversal of 200520154 is 451025002.

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., 178944129 + 21576025 = 13377^2 + 4645^2 .

It is not an unprimeable number, because it can be changed into a prime (200520157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50130037 + ... + 50130040.

Almost surely, 2^200520154 is an apocalyptic number.

200520154 is a deficient number, since it is larger than the sum of its proper divisors (100260080).

200520154 is a wasteful number, since it uses less digits than its factorization.

200520154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100260079.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 200520154 is about 14160.5139031039. The cubic root of 200520154 is about 585.3100886047.

Adding to 200520154 its reverse (451025002), we get a palindrome (651545156).

The spelling of 200520154 in words is "two hundred million, five hundred twenty thousand, one hundred fifty-four".