135120516251 has 8 divisors (see below), whose sum is σ = 154686524160. Its totient is φ = 115620277608.

The previous prime is 135120516233. The next prime is 135120516269. The reversal of 135120516251 is 152615021531.

It is an interprime number because it is at equal distance from previous prime (135120516233) and next prime (135120516269).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135120516251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135120516221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16437911 + ... + 16446128.

It is an arithmetic number, because the mean of its divisors is an integer number (19335815520).

Almost surely, 2^135120516251 is an apocalyptic number.

135120516251 is a deficient number, since it is larger than the sum of its proper divisors (19566007909).

135120516251 is an equidigital number, since it uses as much as digits as its factorization.

135120516251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32884633.

The product of its (nonzero) digits is 9000, while the sum is 32.

Adding to 135120516251 its reverse (152615021531), we get a palindrome (287735537782).

The spelling of 135120516251 in words is "one hundred thirty-five billion, one hundred twenty million, five hundred sixteen thousand, two hundred fifty-one".