2154040102 has 4 divisors (see below), whose sum is σ = 3231060156. Its totient is φ = 1077020050.

The previous prime is 2154040087. The next prime is 2154040121. The reversal of 2154040102 is 2010404512.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2154040102² = 9279777522048340808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2154040102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538510024 + ... + 538510027.

It is an arithmetic number, because the mean of its divisors is an integer number (807765039).

Almost surely, 2^2154040102 is an apocalyptic number.

2154040102 is a deficient number, since it is larger than the sum of its proper divisors (1077020054).

2154040102 is a wasteful number, since it uses less digits than its factorization.

2154040102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077020053.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2154040102 is about 46411.6375707645. The cubic root of 2154040102 is about 1291.4708104304.

Adding to 2154040102 its reverse (2010404512), we get a palindrome (4164444614).

The spelling of 2154040102 in words is "two billion, one hundred fifty-four million, forty thousand, one hundred two".