151262221 has 12 divisors (see below), whose sum is σ = 166900636. Its totient is φ = 136984320.

The previous prime is 151262219. The next prime is 151262227. The reversal of 151262221 is 122262151.

It can be written as a sum of positive squares in 2 ways, for example, as 7502121 + 143760100 = 2739^2 + 11990^2 .

It is not a de Polignac number, because 151262221 - 2¹ = 151262219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151262192 and 151262201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151262227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31261 + ... + 35773.

Almost surely, 2^151262221 is an apocalyptic number.

151262221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

151262221 is a deficient number, since it is larger than the sum of its proper divisors (15638415).

151262221 is a wasteful number, since it uses less digits than its factorization.

151262221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812 (or 4801 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 151262221 is about 12298.8707205174. The cubic root of 151262221 is about 532.8154681069.

The spelling of 151262221 in words is "one hundred fifty-one million, two hundred sixty-two thousand, two hundred twenty-one".