2154121552 has 40 divisors (see below), whose sum is σ = 4699913472. Its totient is φ = 947558400.

The previous prime is 2154121513. The next prime is 2154121631. The reversal of 2154121552 is 2551214512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154121552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191953 + ... + 202864.

Almost surely, 2^2154121552 is an apocalyptic number.

2154121552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2154121552 is an abundant number, since it is smaller than the sum of its proper divisors (2545791920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154121552 is a wasteful number, since it uses less digits than its factorization.

2154121552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394867 (or 394861 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 2154121552 is about 46412.5150363563. The cubic root of 2154121552 is about 1291.4870882103.

The spelling of 2154121552 in words is "two billion, one hundred fifty-four million, one hundred twenty-one thousand, five hundred fifty-two".