2101544402 has 8 divisors (see below), whose sum is σ = 3152519676. Its totient is φ = 1050704512.

The previous prime is 2101544377. The next prime is 2101544531. The reversal of 2101544402 is 2044451012.

It can be written as a sum of positive squares in 2 ways, for example, as 2097548401 + 3996001 = 45799^2 + 1999^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26438 + ... + 70014.

Almost surely, 2^2101544402 is an apocalyptic number.

2101544402 is a deficient number, since it is larger than the sum of its proper divisors (1050975274).

2101544402 is a wasteful number, since it uses less digits than its factorization.

2101544402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67692.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2101544402 is about 45842.6046598576. The cubic root of 2101544402 is about 1280.8930133041.

Adding to 2101544402 its reverse (2044451012), we get a palindrome (4145995414).

The spelling of 2101544402 in words is "two billion, one hundred one million, five hundred forty-four thousand, four hundred two".