2151342551 has 4 divisors (see below), whose sum is σ = 2151720600. Its totient is φ = 2150964504.

The previous prime is 2151342527. The next prime is 2151342593. The reversal of 2151342551 is 1552431512.

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 2151342551 - 2¹⁰ = 2151341527 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 (2151342751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180356 + ... + 191913.

It is an arithmetic number, because the mean of its divisors is an integer number (537930150).

Almost surely, 2^2151342551 is an apocalyptic number.

2151342551 is a deficient number, since it is larger than the sum of its proper divisors (378049).

2151342551 is an equidigital number, since it uses as much as digits as its factorization.

2151342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378048.

The product of its digits is 6000, while the sum is 29.

The square root of 2151342551 is about 46382.5673179051. The cubic root of 2151342551 is about 1290.9314729519.

The spelling of 2151342551 in words is "two billion, one hundred fifty-one million, three hundred forty-two thousand, five hundred fifty-one".