201447557242 has 4 divisors (see below), whose sum is σ = 302171335866. Its totient is φ = 100723778620.

The previous prime is 201447557221. The next prime is 201447557291. The reversal of 201447557242 is 242755744102.

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., 112654880881 + 88792676361 = 335641^2 + 297981^2 .

It is a super-2 number, since 2×201447557242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50361889309 + ... + 50361889312.

Almost surely, 2^201447557242 is an apocalyptic number.

201447557242 is a deficient number, since it is larger than the sum of its proper divisors (100723778624).

201447557242 is a wasteful number, since it uses less digits than its factorization.

201447557242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100723778623.

The product of its (nonzero) digits is 627200, while the sum is 43.

The spelling of 201447557242 in words is "two hundred one billion, four hundred forty-seven million, five hundred fifty-seven thousand, two hundred forty-two".