150521381 has 2 divisors, whose sum is σ = 150521382. Its totient is φ = 150521380.

The previous prime is 150521377. The next prime is 150521429. The reversal of 150521381 is 183125051.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130896481 + 19624900 = 11441^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 150521381 - 2² = 150521377 is a prime.

It is a super-2 number, since 2×150521381² = 45313372276294322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 150521381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150521321) 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, 75260690 + 75260691.

It is an arithmetic number, because the mean of its divisors is an integer number (75260691).

Almost surely, 2^150521381 is an apocalyptic number.

It is an amenable number.

150521381 is a deficient number, since it is larger than the sum of its proper divisors (1).

150521381 is an equidigital number, since it uses as much as digits as its factorization.

150521381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 150521381 is about 12268.7155399414. The cubic root of 150521381 is about 531.9441838006.

The spelling of 150521381 in words is "one hundred fifty million, five hundred twenty-one thousand, three hundred eighty-one".