151352721 has 12 divisors (see below), whose sum is σ = 235437748. Its totient is φ = 93140064.

The previous prime is 151352701. The next prime is 151352731. The reversal of 151352721 is 127253151.

It can be written as a sum of positive squares in 2 ways, for example, as 12702096 + 138650625 = 3564^2 + 11775^2 .

It is not a de Polignac number, because 151352721 - 2⁶ = 151352657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151352701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646690 + ... + 646923.

Almost surely, 2^151352721 is an apocalyptic number.

It is an amenable number.

151352721 is a deficient number, since it is larger than the sum of its proper divisors (84085027).

151352721 is a wasteful number, since it uses less digits than its factorization.

151352721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293632 (or 1293629 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 151352721 is about 12302.5493699477. The cubic root of 151352721 is about 532.9217078676.

The spelling of 151352721 in words is "one hundred fifty-one million, three hundred fifty-two thousand, seven hundred twenty-one".