2001551084 has 72 divisors (see below), whose sum is σ = 3964851072. Its totient is φ = 877962240.

The previous prime is 2001551077. The next prime is 2001551089. The reversal of 2001551084 is 4801551002.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (2001551089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8590232 + ... + 8590464.

It is an arithmetic number, because the mean of its divisors is an integer number (55067376).

Almost surely, 2^2001551084 is an apocalyptic number.

It is an amenable number.

2001551084 is a deficient number, since it is larger than the sum of its proper divisors (1963299988).

2001551084 is a wasteful number, since it uses less digits than its factorization.

2001551084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 2001551084 is about 44738.6978353193. The cubic root of 2001551084 is about 1260.2466729615.

The spelling of 2001551084 in words is "two billion, one million, five hundred fifty-one thousand, eighty-four".