2125987231 has 4 divisors (see below), whose sum is σ = 2126119464. Its totient is φ = 2125855000.

The previous prime is 2125987219. The next prime is 2125987243. The reversal of 2125987231 is 1327895212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2125987219) and next prime (2125987243).

It is a cyclic number.

It is not a de Polignac number, because 2125987231 - 2¹⁹ = 2125462943 is a prime.

It is a super-2 number, since 2×2125987231² = 9039643412750094722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125987261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38020 + ... + 75481.

It is an arithmetic number, because the mean of its divisors is an integer number (531529866).

Almost surely, 2^2125987231 is an apocalyptic number.

2125987231 is a deficient number, since it is larger than the sum of its proper divisors (132233).

2125987231 is a wasteful number, since it uses less digits than its factorization.

2125987231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132232.

The product of its digits is 60480, while the sum is 40.

The square root of 2125987231 is about 46108.4290667119. The cubic root of 2125987231 is about 1285.8398585365.

The spelling of 2125987231 in words is "two billion, one hundred twenty-five million, nine hundred eighty-seven thousand, two hundred thirty-one".