150631621 has 4 divisors (see below), whose sum is σ = 172150432. Its totient is φ = 129112812.

The previous prime is 150631589. The next prime is 150631627. The reversal of 150631621 is 126136051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 150631621 - 2⁵ = 150631589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150631627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10759395 + ... + 10759408.

It is an arithmetic number, because the mean of its divisors is an integer number (43037608).

Almost surely, 2^150631621 is an apocalyptic number.

It is an amenable number.

150631621 is a deficient number, since it is larger than the sum of its proper divisors (21518811).

150631621 is an equidigital number, since it uses as much as digits as its factorization.

150631621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21518810.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 150631621 is about 12273.2074454887. The cubic root of 150631621 is about 532.0740152264.

Adding to 150631621 its reverse (126136051), we get a palindrome (276767672).

The spelling of 150631621 in words is "one hundred fifty million, six hundred thirty-one thousand, six hundred twenty-one".