2111862025 has 81 divisors (see below), whose sum is σ = 3331588383. Its totient is φ = 1323504000.

The previous prime is 2111862023. The next prime is 2111862037. The reversal of 2111862025 is 5202681112.

The square root of 2111862025 is 45955.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 943042681 + 1168819344 = 30709^2 + 34188^2 .

It is not a de Polignac number, because 2111862025 - 2¹ = 2111862023 is a prime.

It is a super-2 number, since 2×2111862025² = 8919922425274201250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111861984 and 2111862002.

It is not an unprimeable number, because it can be changed into a prime (2111862023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 20909475 + ... + 20909575.

Almost surely, 2^2111862025 is an apocalyptic number.

2111862025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2111862025 is the 45955-th square number.

2111862025 is the 22978-th centered octagonal number.

It is an amenable number.

2111862025 is a deficient number, since it is larger than the sum of its proper divisors (1219726358).

2111862025 is a wasteful number, since it uses less digits than its factorization.

2111862025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The cubic root of 2111862025 is about 1282.9857920244.

The spelling of 2111862025 in words is "two billion, one hundred eleven million, eight hundred sixty-two thousand, twenty-five".