2151616403 has 4 divisors (see below), whose sum is σ = 2156585928. Its totient is φ = 2146646880.

The previous prime is 2151616399. The next prime is 2151616417. The reversal of 2151616403 is 3046161512.

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 2151616403 - 2² = 2151616399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151619403) 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, 2484113 + ... + 2484978.

It is an arithmetic number, because the mean of its divisors is an integer number (539146482).

Almost surely, 2^2151616403 is an apocalyptic number.

2151616403 is a deficient number, since it is larger than the sum of its proper divisors (4969525).

2151616403 is an equidigital number, since it uses as much as digits as its factorization.

2151616403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4969524.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2151616403 is about 46385.5193244616. The cubic root of 2151616403 is about 1290.9862463718.

Adding to 2151616403 its reverse (3046161512), we get a palindrome (5197777915).

The spelling of 2151616403 in words is "two billion, one hundred fifty-one million, six hundred sixteen thousand, four hundred three".