150521921 has 12 divisors (see below), whose sum is σ = 167078544. Its totient is φ = 134484600.

The previous prime is 150521869. The next prime is 150521923. The reversal of 150521921 is 129125051.

It is not a de Polignac number, because 150521921 - 2¹⁰ = 150520897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (150521923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36326 + ... + 40256.

It is an arithmetic number, because the mean of its divisors is an integer number (13923212).

Almost surely, 2^150521921 is an apocalyptic number.

150521921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

150521921 is a deficient number, since it is larger than the sum of its proper divisors (16556623).

150521921 is an equidigital number, since it uses as much as digits as its factorization.

150521921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060 (or 4001 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 150521921 is about 12268.7375471154. The cubic root of 150521921 is about 531.9448199218.

Adding to 150521921 its reverse (129125051), we get a palindrome (279646972).

The spelling of 150521921 in words is "one hundred fifty million, five hundred twenty-one thousand, nine hundred twenty-one".