2154034321402 has 16 divisors (see below), whose sum is σ = 3237054895080. Its totient is φ = 1075017678592.

The previous prime is 2154034321363. The next prime is 2154034321409. The reversal of 2154034321402 is 2041234304512.

It can be written as a sum of positive squares in 4 ways, for example, as 2049796387521 + 104237933881 = 1431711^2 + 322859^2 .

It is not an unprimeable number, because it can be changed into a prime (2154034321409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197158 + ... + 3022510.

Almost surely, 2^{2154034321402} is an apocalyptic number.

2154034321402 is a deficient number, since it is larger than the sum of its proper divisors (1083020573678).

2154034321402 is a wasteful number, since it uses less digits than its factorization.

2154034321402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827777.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 2154034321402 its reverse (2041234304512), we get a palindrome (4195268625914).

The spelling of 2154034321402 in words is "two trillion, one hundred fifty-four billion, thirty-four million, three hundred twenty-one thousand, four hundred two".