60151721 has 4 divisors (see below), whose sum is σ = 68744832. Its totient is φ = 51558612.

The previous prime is 60151717. The next prime is 60151733. The reversal of 60151721 is 12715106.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 60151721 - 2² = 60151717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60151121) 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, 4296545 + ... + 4296558.

It is an arithmetic number, because the mean of its divisors is an integer number (17186208).

Almost surely, 2^60151721 is an apocalyptic number.

It is an amenable number.

60151721 is a deficient number, since it is larger than the sum of its proper divisors (8593111).

60151721 is an equidigital number, since it uses as much as digits as its factorization.

60151721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8593110.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 60151721 is about 7755.7540574724. The cubic root of 60151721 is about 391.8164683855.

Adding to 60151721 its reverse (12715106), we get a palindrome (72866827).

The spelling of 60151721 in words is "sixty million, one hundred fifty-one thousand, seven hundred twenty-one".