203015400242 has 4 divisors (see below), whose sum is σ = 304523100366. Its totient is φ = 101507700120.

The previous prime is 203015400229. The next prime is 203015400253. The reversal of 203015400242 is 242004510302.

It is a happy number.

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., 201501334321 + 1514065921 = 448889^2 + 38911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50753850059 + ... + 50753850062.

Almost surely, 2^203015400242 is an apocalyptic number.

203015400242 is a deficient number, since it is larger than the sum of its proper divisors (101507700124).

203015400242 is a wasteful number, since it uses less digits than its factorization.

203015400242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101507700123.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 203015400242 its reverse (242004510302), we get a palindrome (445019910544).

The spelling of 203015400242 in words is "two hundred three billion, fifteen million, four hundred thousand, two hundred forty-two".