2125178501 has 2 divisors, whose sum is σ = 2125178502. Its totient is φ = 2125178500.

The previous prime is 2125178441. The next prime is 2125178569. The reversal of 2125178501 is 1058715212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1931690401 + 193488100 = 43951^2 + 13910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125178501 - 2²² = 2120984197 is a prime.

It is a super-2 number, since 2×2125178501² = 9032767322225214002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125172501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062589250 + 1062589251.

It is an arithmetic number, because the mean of its divisors is an integer number (1062589251).

Almost surely, 2^2125178501 is an apocalyptic number.

It is an amenable number.

2125178501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125178501 is an equidigital number, since it uses as much as digits as its factorization.

2125178501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 2125178501 is about 46099.6583609901. The cubic root of 2125178501 is about 1285.6767924651.

The spelling of 2125178501 in words is "two billion, one hundred twenty-five million, one hundred seventy-eight thousand, five hundred one".