157221833 has 2 divisors, whose sum is σ = 157221834. Its totient is φ = 157221832.

The previous prime is 157221829. The next prime is 157221851. The reversal of 157221833 is 338122751.

157221833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134258569 + 22963264 = 11587^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 157221833 - 2² = 157221829 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157221833.

It is not a weakly prime, because it can be changed into another prime (157221133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78610916 + 78610917.

It is an arithmetic number, because the mean of its divisors is an integer number (78610917).

Almost surely, 2^157221833 is an apocalyptic number.

It is an amenable number.

157221833 is a deficient number, since it is larger than the sum of its proper divisors (1).

157221833 is an equidigital number, since it uses as much as digits as its factorization.

157221833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 157221833 is about 12538.8130618492. The cubic root of 157221833 is about 539.7230324067.

The spelling of 157221833 in words is "one hundred fifty-seven million, two hundred twenty-one thousand, eight hundred thirty-three".