2151142440245 has 8 divisors (see below), whose sum is σ = 2590689958584. Its totient is φ = 1714701265344.

The previous prime is 2151142440241. The next prime is 2151142440257. The reversal of 2151142440245 is 5420442411512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48065300644 + 2103077139601 = 219238^2 + 1450199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151142440245 - 2² = 2151142440241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151142440241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776584334 + ... + 776587103.

It is an arithmetic number, because the mean of its divisors is an integer number (323836244823).

Almost surely, 2^{2151142440245} is an apocalyptic number.

It is an amenable number.

2151142440245 is a deficient number, since it is larger than the sum of its proper divisors (439547518339).

2151142440245 is a wasteful number, since it uses less digits than its factorization.

2151142440245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553171719.

The product of its (nonzero) digits is 51200, while the sum is 35.

Adding to 2151142440245 its reverse (5420442411512), we get a palindrome (7571584851757).

The spelling of 2151142440245 in words is "two trillion, one hundred fifty-one billion, one hundred forty-two million, four hundred forty thousand, two hundred forty-five".