2154231402 has 8 divisors (see below), whose sum is σ = 4308462816. Its totient is φ = 718077132.

The previous prime is 2154231397. The next prime is 2154231407. The reversal of 2154231402 is 2041324512.

It is an interprime number because it is at equal distance from previous prime (2154231397) and next prime (2154231407).

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

2154231402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2154231407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179519278 + ... + 179519289.

It is an arithmetic number, because the mean of its divisors is an integer number (538557852).

Almost surely, 2^2154231402 is an apocalyptic number.

2154231402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2154231402 is a wasteful number, since it uses less digits than its factorization.

2154231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359038572.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2154231402 is about 46413.6984305280. The cubic root of 2154231402 is about 1291.5090410793.

Adding to 2154231402 its reverse (2041324512), we get a palindrome (4195555914).

The spelling of 2154231402 in words is "two billion, one hundred fifty-four million, two hundred thirty-one thousand, four hundred two".