2197078525 has 6 divisors (see below), whose sum is σ = 2724377402. Its totient is φ = 1757662800.

The previous prime is 2197078511. The next prime is 2197078529. The reversal of 2197078525 is 5258707912.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 162256644 + 2034821881 = 12738^2 + 45109^2 .

It is not a de Polignac number, because 2197078525 - 2¹³ = 2197070333 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 (2197078529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43941546 + ... + 43941595.

Almost surely, 2^2197078525 is an apocalyptic number.

2197078525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2197078525 is a deficient number, since it is larger than the sum of its proper divisors (527298877).

2197078525 is an equidigital number, since it uses as much as digits as its factorization.

2197078525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87883151 (or 87883146 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 2197078525 is about 46873.0042241800. The cubic root of 2197078525 is about 1300.0154879812.

The spelling of 2197078525 in words is "two billion, one hundred ninety-seven million, seventy-eight thousand, five hundred twenty-five".