2078531 has 18 divisors (see below), whose sum is σ = 2628612. Its totient is φ = 1638000.

The previous prime is 2078513. The next prime is 2078537. The reversal of 2078531 is 1358702.

It is not a de Polignac number, because 2078531 - 2¹⁴ = 2062147 is a prime.

It is a super-2 number, since 2×2078531² = 8640582235922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2078531.

It is not an unprimeable number, because it can be changed into a prime (2078537) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8156 + ... + 8406.

It is an arithmetic number, because the mean of its divisors is an integer number (146034).

2^2078531 is an apocalyptic number.

2078531 is a deficient number, since it is larger than the sum of its proper divisors (550081).

2078531 is a wasteful number, since it uses less digits than its factorization.

2078531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2078531 is about 1441.7111361157. The cubic root of 2078531 is about 127.6200279422.

The spelling of 2078531 in words is "two million, seventy-eight thousand, five hundred thirty-one".