721134151 has 4 divisors (see below), whose sum is σ = 759088600. Its totient is φ = 683179704.

The previous prime is 721134103. The next prime is 721134217. The reversal of 721134151 is 151431127.

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 721134151 - 2¹¹ = 721132103 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 (721134451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18977196 + ... + 18977233.

It is an arithmetic number, because the mean of its divisors is an integer number (189772150).

Almost surely, 2^721134151 is an apocalyptic number.

721134151 is a deficient number, since it is larger than the sum of its proper divisors (37954449).

721134151 is a wasteful number, since it uses less digits than its factorization.

721134151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37954448.

The product of its digits is 840, while the sum is 25.

The square root of 721134151 is about 26853.9410701670. The cubic root of 721134151 is about 896.7513125793.

Adding to 721134151 its reverse (151431127), we get a palindrome (872565278).

The spelling of 721134151 in words is "seven hundred twenty-one million, one hundred thirty-four thousand, one hundred fifty-one".