151011721 has 16 divisors (see below), whose sum is σ = 180576000. Its totient is φ = 123475968.

The previous prime is 151011719. The next prime is 151011779. The reversal of 151011721 is 127110151.

It is not a de Polignac number, because 151011721 - 2¹ = 151011719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71245 + ... + 73333.

It is an arithmetic number, because the mean of its divisors is an integer number (11286000).

Almost surely, 2^151011721 is an apocalyptic number.

It is an amenable number.

151011721 is a deficient number, since it is larger than the sum of its proper divisors (29564279).

151011721 is a wasteful number, since it uses less digits than its factorization.

151011721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 70, while the sum is 19.

The square root of 151011721 is about 12288.6826389162. The cubic root of 151011721 is about 532.5211799932.

Adding to 151011721 its reverse (127110151), we get a palindrome (278121872).

It can be divided in two parts, 1510 and 11721, that added together give a palindrome (13231).

The spelling of 151011721 in words is "one hundred fifty-one million, eleven thousand, seven hundred twenty-one".