152221477 has 2 divisors, whose sum is σ = 152221478. Its totient is φ = 152221476.

The previous prime is 152221471. The next prime is 152221523. The reversal of 152221477 is 774122251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134235396 + 17986081 = 11586^2 + 4241^2 .

It is a cyclic number.

It is not a de Polignac number, because 152221477 - 2³ = 152221469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152221471) 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 as a sum of consecutive naturals, namely, 76110738 + 76110739.

It is an arithmetic number, because the mean of its divisors is an integer number (76110739).

Almost surely, 2^152221477 is an apocalyptic number.

It is an amenable number.

152221477 is a deficient number, since it is larger than the sum of its proper divisors (1).

152221477 is an equidigital number, since it uses as much as digits as its factorization.

152221477 is an odious number, because the sum of its binary digits is odd.

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

The square root of 152221477 is about 12337.8068148273. The cubic root of 152221477 is about 533.9394099125.

The spelling of 152221477 in words is "one hundred fifty-two million, two hundred twenty-one thousand, four hundred seventy-seven".