2151223525 has 24 divisors (see below), whose sum is σ = 2913206400. Its totient is φ = 1562812800.

The previous prime is 2151223513. The next prime is 2151223531. The reversal of 2151223525 is 5253221512.

It is not a de Polignac number, because 2151223525 - 2⁵ = 2151223493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2151223493 and 2151223502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281961 + ... + 289489.

It is an arithmetic number, because the mean of its divisors is an integer number (121383600).

Almost surely, 2^2151223525 is an apocalyptic number.

2151223525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151223525 is a deficient number, since it is larger than the sum of its proper divisors (761982875).

2151223525 is a wasteful number, since it uses less digits than its factorization.

2151223525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589 (or 8584 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 2151223525 is about 46381.2842103364. The cubic root of 2151223525 is about 1290.9076649902.

The spelling of 2151223525 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, five hundred twenty-five".