2154401442 has 64 divisors (see below), whose sum is σ = 4929724800. Its totient is φ = 696911040.

The previous prime is 2154401441. The next prime is 2154401471. The reversal of 2154401442 is 2441044512.

2154401442 is a `hidden beast` number, since 215 + 4 + 4 + 0 + 1 + 442 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2154401441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 919909 + ... + 922247.

It is an arithmetic number, because the mean of its divisors is an integer number (77026950).

Almost surely, 2^2154401442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154401442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464862400).

2154401442 is an abundant number, since it is smaller than the sum of its proper divisors (2775323358).

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

2154401442 is a wasteful number, since it uses less digits than its factorization.

2154401442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 2154401442 is about 46415.5301811797. The cubic root of 2154401442 is about 1291.5430210902.

Adding to 2154401442 its reverse (2441044512), we get a palindrome (4595445954).

The spelling of 2154401442 in words is "two billion, one hundred fifty-four million, four hundred one thousand, four hundred forty-two".