2154402972 has 36 divisors (see below), whose sum is σ = 5453491680. Its totient is φ = 717126912.

The previous prime is 2154402931. The next prime is 2154402973. The reversal of 2154402972 is 2792044512.

2154402972 is a `hidden beast` number, since 21 + 544 + 0 + 2 + 97 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154402973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15733 + ... + 67500.

It is an arithmetic number, because the mean of its divisors is an integer number (151485880).

Almost surely, 2^2154402972 is an apocalyptic number.

It is an amenable number.

2154402972 is an abundant number, since it is smaller than the sum of its proper divisors (3299088708).

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

2154402972 is a wasteful number, since it uses less digits than its factorization.

2154402972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83962 (or 83957 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 2154402972 is about 46415.5466627293. The cubic root of 2154402972 is about 1291.5433268303.

The spelling of 2154402972 in words is "two billion, one hundred fifty-four million, four hundred two thousand, nine hundred seventy-two".