53951381221 has 8 divisors (see below), whose sum is σ = 56634205824. Its totient is φ = 51296649360.

The previous prime is 53951381219. The next prime is 53951381249. The reversal of 53951381221 is 12218315935.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53951381221 - 2¹ = 53951381219 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 (53951381291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7019250 + ... + 7026931.

It is an arithmetic number, because the mean of its divisors is an integer number (7079275728).

Almost surely, 2^53951381221 is an apocalyptic number.

It is an amenable number.

53951381221 is a deficient number, since it is larger than the sum of its proper divisors (2682824603).

53951381221 is a wasteful number, since it uses less digits than its factorization.

53951381221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14046371.

The product of its digits is 64800, while the sum is 40.

The spelling of 53951381221 in words is "fifty-three billion, nine hundred fifty-one million, three hundred eighty-one thousand, two hundred twenty-one".