2101403551 has 4 divisors (see below), whose sum is σ = 2263049992. Its totient is φ = 1939757112.

The previous prime is 2101403527. The next prime is 2101403561. The reversal of 2101403551 is 1553041012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2101403551 - 2²⁹ = 1564532639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101403501) 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, 80823201 + ... + 80823226.

It is an arithmetic number, because the mean of its divisors is an integer number (565762498).

Almost surely, 2^2101403551 is an apocalyptic number.

2101403551 is a deficient number, since it is larger than the sum of its proper divisors (161646441).

2101403551 is a wasteful number, since it uses less digits than its factorization.

2101403551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161646440.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2101403551 is about 45841.0683885094. The cubic root of 2101403551 is about 1280.8643963986.

Adding to 2101403551 its reverse (1553041012), we get a palindrome (3654444563).

The spelling of 2101403551 in words is "two billion, one hundred one million, four hundred three thousand, five hundred fifty-one".