152721418 has 8 divisors (see below), whose sum is σ = 229643460. Its totient is φ = 76173600.

The previous prime is 152721391. The next prime is 152721431. The reversal of 152721418 is 814127251.

It can be written as a sum of positive squares in 2 ways, for example, as 149989009 + 2732409 = 12247^2 + 1653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 152721418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92533 + ... + 94168.

Almost surely, 2^152721418 is an apocalyptic number.

152721418 is a deficient number, since it is larger than the sum of its proper divisors (76922042).

152721418 is a wasteful number, since it uses less digits than its factorization.

152721418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187112.

The product of its digits is 4480, while the sum is 31.

The square root of 152721418 is about 12358.0507362610. The cubic root of 152721418 is about 534.5233102153.

Adding to 152721418 its reverse (814127251), we get a palindrome (966848669).

The spelling of 152721418 in words is "one hundred fifty-two million, seven hundred twenty-one thousand, four hundred eighteen".