2157525 has 36 divisors (see below), whose sum is σ = 3971968. Its totient is φ = 1118880.

The previous prime is 2157523. The next prime is 2157527. The reversal of 2157525 is 5257512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2157523) and next prime (2157527).

It is not a de Polignac number, because 2157525 - 2¹ = 2157523 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 (2157523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9564 + ... + 9786.

2^2157525 is an apocalyptic number.

2157525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2157525 is a deficient number, since it is larger than the sum of its proper divisors (1814443).

2157525 is a wasteful number, since it uses less digits than its factorization.

2157525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 274 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 2157525 is about 1468.8515922312. The cubic root of 2157525 is about 129.2166900707.

The spelling of 2157525 in words is "two million, one hundred fifty-seven thousand, five hundred twenty-five".