2145545515 has 8 divisors (see below), whose sum is σ = 2591054640. Its totient is φ = 1705503072.

The previous prime is 2145545477. The next prime is 2145545543. The reversal of 2145545515 is 5155455412.

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 2145545515 - 2⁷ = 2145545387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365805 + ... + 1367374.

It is an arithmetic number, because the mean of its divisors is an integer number (323881830).

Almost surely, 2^2145545515 is an apocalyptic number.

2145545515 is a deficient number, since it is larger than the sum of its proper divisors (445509125).

2145545515 is a wasteful number, since it uses less digits than its factorization.

2145545515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733341.

The product of its digits is 100000, while the sum is 37.

The square root of 2145545515 is about 46320.0336247719. The cubic root of 2145545515 is about 1289.7709095818.

The spelling of 2145545515 in words is "two billion, one hundred forty-five million, five hundred forty-five thousand, five hundred fifteen".