2154513556 has 24 divisors (see below), whose sum is σ = 4062582944. Its totient is φ = 993863520.

The previous prime is 2154513541. The next prime is 2154513563. The reversal of 2154513556 is 6553154512.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 98371 + ... + 118261.

Almost surely, 2^2154513556 is an apocalyptic number.

2154513556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2154513556 is a deficient number, since it is larger than the sum of its proper divisors (1908069388).

2154513556 is a wasteful number, since it uses less digits than its factorization.

2154513556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21991 (or 21989 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The square root of 2154513556 is about 46416.7378862410. The cubic root of 2154513556 is about 1291.5654244578.

The spelling of 2154513556 in words is "two billion, one hundred fifty-four million, five hundred thirteen thousand, five hundred fifty-six".