2551016242 has 4 divisors (see below), whose sum is σ = 3826524366. Its totient is φ = 1275508120.

The previous prime is 2551016213. The next prime is 2551016249. The reversal of 2551016242 is 2426101552.

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., 2002473001 + 548543241 = 44749^2 + 23421^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2551016242.

It is not an unprimeable number, because it can be changed into a prime (2551016249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637754059 + ... + 637754062.

Almost surely, 2^2551016242 is an apocalyptic number.

2551016242 is a deficient number, since it is larger than the sum of its proper divisors (1275508124).

2551016242 is a wasteful number, since it uses less digits than its factorization.

2551016242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275508123.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2551016242 is about 50507.5859846815. The cubic root of 2551016242 is about 1366.3786724378.

Adding to 2551016242 its reverse (2426101552), we get a palindrome (4977117794).

The spelling of 2551016242 in words is "two billion, five hundred fifty-one million, sixteen thousand, two hundred forty-two".