152477221 has 4 divisors (see below), whose sum is σ = 164206252. Its totient is φ = 140748192.

The previous prime is 152477219. The next prime is 152477231. The reversal of 152477221 is 122774251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122774251 = 37 ⋅3318223.

It can be written as a sum of positive squares in 2 ways, for example, as 37344321 + 115132900 = 6111^2 + 10730^2 .

It is not a de Polignac number, because 152477221 - 2¹ = 152477219 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 (152477201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5864496 + ... + 5864521.

It is an arithmetic number, because the mean of its divisors is an integer number (41051563).

Almost surely, 2^152477221 is an apocalyptic number.

It is an amenable number.

152477221 is a deficient number, since it is larger than the sum of its proper divisors (11729031).

152477221 is a wasteful number, since it uses less digits than its factorization.

152477221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11729030.

The product of its digits is 7840, while the sum is 31.

The square root of 152477221 is about 12348.1667060337. The cubic root of 152477221 is about 534.2382626146.

The spelling of 152477221 in words is "one hundred fifty-two million, four hundred seventy-seven thousand, two hundred twenty-one".