2135402551 has 4 divisors (see below), whose sum is σ = 2135687472. Its totient is φ = 2135117632.

The previous prime is 2135402537. The next prime is 2135402557. The reversal of 2135402551 is 1552045312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2135402551 - 2⁵ = 2135402519 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 (2135402557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130906 + ... + 146311.

It is an arithmetic number, because the mean of its divisors is an integer number (533921868).

Almost surely, 2^2135402551 is an apocalyptic number.

2135402551 is a deficient number, since it is larger than the sum of its proper divisors (284921).

2135402551 is an equidigital number, since it uses as much as digits as its factorization.

2135402551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284920.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2135402551 is about 46210.4160444374. The cubic root of 2135402551 is about 1287.7352549154.

Adding to 2135402551 its reverse (1552045312), we get a palindrome (3687447863).

The spelling of 2135402551 in words is "two billion, one hundred thirty-five million, four hundred two thousand, five hundred fifty-one".