50156221651221 has 24 divisors (see below), whose sum is σ = 77801182752864. Its totient is φ = 28657802527200.

The previous prime is 50156221651181. The next prime is 50156221651231. The reversal of 50156221651221 is 12215612265105.

It is a happy number.

It is not a de Polignac number, because 50156221651221 - 2¹⁷ = 50156221520149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50156221651221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50156221651231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15775075 + ... + 18685968.

It is an arithmetic number, because the mean of its divisors is an integer number (3241715948036).

Almost surely, 2^{50156221651221} is an apocalyptic number.

It is an amenable number.

50156221651221 is a deficient number, since it is larger than the sum of its proper divisors (27644961101643).

50156221651221 is a wasteful number, since it uses less digits than its factorization.

50156221651221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34470961 (or 34470954 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 50156221651221 in words is "fifty trillion, one hundred fifty-six billion, two hundred twenty-one million, six hundred fifty-one thousand, two hundred twenty-one".