221070151 has 2 divisors, whose sum is σ = 221070152. Its totient is φ = 221070150.

The previous prime is 221070139. The next prime is 221070163. The reversal of 221070151 is 151070122.

221070151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (221070139) and next prime (221070163).

It is a cyclic number.

It is not a de Polignac number, because 221070151 - 2⁵ = 221070119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221070121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110535075 + 110535076.

It is an arithmetic number, because the mean of its divisors is an integer number (110535076).

Almost surely, 2^221070151 is an apocalyptic number.

221070151 is a deficient number, since it is larger than the sum of its proper divisors (1).

221070151 is an equidigital number, since it uses as much as digits as its factorization.

221070151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 221070151 is about 14868.4279935708. The cubic root of 221070151 is about 604.6583240237.

It can be divided in two parts, 2210 and 70151, that added together give a square (72361 = 269²).

The spelling of 221070151 in words is "two hundred twenty-one million, seventy thousand, one hundred fifty-one".