50311521 has 12 divisors (see below), whose sum is σ = 78262548. Its totient is φ = 30960864.

The previous prime is 50311493. The next prime is 50311537. The reversal of 50311521 is 12511305.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 44036496 = 2505^2 + 6636^2 .

It is not a de Polignac number, because 50311521 - 2¹⁴ = 50295137 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 50311494 and 50311503.

It is not an unprimeable number, because it can be changed into a prime (50311571) 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, 214890 + ... + 215123.

It is an arithmetic number, because the mean of its divisors is an integer number (6521879).

Almost surely, 2^50311521 is an apocalyptic number.

It is an amenable number.

50311521 is a deficient number, since it is larger than the sum of its proper divisors (27951027).

50311521 is a wasteful number, since it uses less digits than its factorization.

50311521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430032 (or 430029 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 50311521 is about 7093.0614687876. The cubic root of 50311521 is about 369.1666684897.

Adding to 50311521 its reverse (12511305), we get a palindrome (62822826).

The spelling of 50311521 in words is "fifty million, three hundred eleven thousand, five hundred twenty-one".