150512561 has 4 divisors (see below), whose sum is σ = 151973952. Its totient is φ = 149051172.

The previous prime is 150512539. The next prime is 150512563. The reversal of 150512561 is 165215051.

150512561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165215051 = 19 ⋅8695529.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150512561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 150512561.

It is not an unprimeable number, because it can be changed into a prime (150512563) 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, 730541 + ... + 730746.

It is an arithmetic number, because the mean of its divisors is an integer number (37993488).

Almost surely, 2^150512561 is an apocalyptic number.

It is an amenable number.

150512561 is a deficient number, since it is larger than the sum of its proper divisors (1461391).

150512561 is a wasteful number, since it uses less digits than its factorization.

150512561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461390.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 150512561 is about 12268.3560838443. The cubic root of 150512561 is about 531.9337936059.

The spelling of 150512561 in words is "one hundred fifty million, five hundred twelve thousand, five hundred sixty-one".