2154020525 has 6 divisors (see below), whose sum is σ = 2670985482. Its totient is φ = 1723216400.

The previous prime is 2154020503. The next prime is 2154020549. The reversal of 2154020525 is 5250204512.

2154020525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 314211076 + 1839809449 = 17726^2 + 42893^2 .

It is not a de Polignac number, because 2154020525 - 2¹² = 2154016429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154020494 and 2154020503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43080386 + ... + 43080435.

It is an arithmetic number, because the mean of its divisors is an integer number (445164247).

Almost surely, 2^2154020525 is an apocalyptic number.

2154020525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2154020525 is a deficient number, since it is larger than the sum of its proper divisors (516964957).

2154020525 is an equidigital number, since it uses as much as digits as its factorization.

2154020525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86160831 (or 86160826 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2154020525 is about 46411.4266641309. The cubic root of 2154020525 is about 1291.4668979064.

The spelling of 2154020525 in words is "two billion, one hundred fifty-four million, twenty thousand, five hundred twenty-five".