2021556154 has 8 divisors (see below), whose sum is σ = 3037141728. Its totient is φ = 1009175580.

The previous prime is 2021556149. The next prime is 2021556169. The reversal of 2021556154 is 4516551202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799672 + ... + 802195.

It is an arithmetic number, because the mean of its divisors is an integer number (379642716).

Almost surely, 2^2021556154 is an apocalyptic number.

2021556154 is a deficient number, since it is larger than the sum of its proper divisors (1015585574).

2021556154 is a wasteful number, since it uses less digits than its factorization.

2021556154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602500.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2021556154 is about 44961.7187616310. The cubic root of 2021556154 is about 1264.4313929202.

The spelling of 2021556154 in words is "two billion, twenty-one million, five hundred fifty-six thousand, one hundred fifty-four".