2151001554 has 32 divisors (see below), whose sum is σ = 4634691264. Its totient is φ = 661594560.

The previous prime is 2151001553. The next prime is 2151001597. The reversal of 2151001554 is 4551001512.

It is not an unprimeable number, because it can be changed into a prime (2151001553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400672 + ... + 406004.

It is an arithmetic number, because the mean of its divisors is an integer number (144834102).

Almost surely, 2^2151001554 is an apocalyptic number.

2151001554 is an abundant number, since it is smaller than the sum of its proper divisors (2483689710).

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

2151001554 is a wasteful number, since it uses less digits than its factorization.

2151001554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2151001554 is about 46378.8912545352. The cubic root of 2151001554 is about 1290.8632632938.

The spelling of 2151001554 in words is "two billion, one hundred fifty-one million, one thousand, five hundred fifty-four".