2155140125 has 16 divisors (see below), whose sum is σ = 2692468272. Its totient is φ = 1722283200.

The previous prime is 2155140107. The next prime is 2155140137. The reversal of 2155140125 is 5210415512.

It can be written as a sum of positive squares in 8 ways, for example, as 882505849 + 1272634276 = 29707^2 + 35674^2 .

It is not a de Polignac number, because 2155140125 - 2⁸ = 2155139869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155140094 and 2155140103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115979 + ... + 133271.

It is an arithmetic number, because the mean of its divisors is an integer number (168279267).

Almost surely, 2^2155140125 is an apocalyptic number.

2155140125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155140125 is a deficient number, since it is larger than the sum of its proper divisors (537328147).

2155140125 is an equidigital number, since it uses as much as digits as its factorization.

2155140125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18305 (or 18295 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2155140125 is about 46423.4867820158. The cubic root of 2155140125 is about 1291.6906153497.

Adding to 2155140125 its reverse (5210415512), we get a palindrome (7365555637).

The spelling of 2155140125 in words is "two billion, one hundred fifty-five million, one hundred forty thousand, one hundred twenty-five".