2154615 has 12 divisors (see below), whose sum is σ = 3456504. Its totient is φ = 1146096.

The previous prime is 2154611. The next prime is 2154629. The reversal of 2154615 is 5164512.

It is not a de Polignac number, because 2154615 - 2² = 2154611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5496 + ... + 5874.

It is an arithmetic number, because the mean of its divisors is an integer number (288042).

2^2154615 is an apocalyptic number.

2154615 is a deficient number, since it is larger than the sum of its proper divisors (1301889).

2154615 is an frugal number, since it uses more digits than its factorization.

2154615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 387 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 2154615 is about 1467.8606882126. The cubic root of 2154615 is about 129.1585695005.

The spelling of 2154615 in words is "two million, one hundred fifty-four thousand, six hundred fifteen".