2157519 has 24 divisors (see below), whose sum is σ = 3606960. Its totient is φ = 1137024.

The previous prime is 2157517. The next prime is 2157523. The reversal of 2157519 is 9157512.

It is not a de Polignac number, because 2157519 - 2¹ = 2157517 is a prime.

It is a super-2 number, since 2×2157519² = 9309776470722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1347 + ... + 2475.

It is an arithmetic number, because the mean of its divisors is an integer number (150290).

2^2157519 is an apocalyptic number.

2157519 is a deficient number, since it is larger than the sum of its proper divisors (1449441).

2157519 is a wasteful number, since it uses less digits than its factorization.

2157519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1152 counting only the distinct ones).

The product of its digits is 3150, while the sum is 30.

The square root of 2157519 is about 1468.8495498178. The cubic root of 2157519 is about 129.2165702883.

The spelling of 2157519 in words is "two million, one hundred fifty-seven thousand, five hundred nineteen".