2145553511 has 8 divisors (see below), whose sum is σ = 2263322880. Its totient is φ = 2028268728.

The previous prime is 2145553481. The next prime is 2145553513. The reversal of 2145553511 is 1153555412.

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 2145553511 - 2¹⁴ = 2145537127 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 (2145553513) 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 7 ways as a sum of consecutive naturals, for example, 112031 + ... + 129776.

It is an arithmetic number, because the mean of its divisors is an integer number (282915360).

Almost surely, 2^2145553511 is an apocalyptic number.

2145553511 is a deficient number, since it is larger than the sum of its proper divisors (117769369).

2145553511 is a wasteful number, since it uses less digits than its factorization.

2145553511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242293.

The product of its digits is 15000, while the sum is 32.

The square root of 2145553511 is about 46320.1199372368. The cubic root of 2145553511 is about 1289.7725118154.

The spelling of 2145553511 in words is "two billion, one hundred forty-five million, five hundred fifty-three thousand, five hundred eleven".