53177402221 has 4 divisors (see below), whose sum is σ = 53559973600. Its totient is φ = 52794830844.

The previous prime is 53177402209. The next prime is 53177402231. The reversal of 53177402221 is 12220477135.

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 53177402221 - 2⁷ = 53177402093 is a prime.

It is a super-2 number, since 2×53177402221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53177402231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191285481 + ... + 191285758.

It is an arithmetic number, because the mean of its divisors is an integer number (13389993400).

Almost surely, 2^53177402221 is an apocalyptic number.

It is an amenable number.

53177402221 is a deficient number, since it is larger than the sum of its proper divisors (382571379).

53177402221 is a wasteful number, since it uses less digits than its factorization.

53177402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382571378.

The product of its (nonzero) digits is 23520, while the sum is 34.

Adding to 53177402221 its reverse (12220477135), we get a palindrome (65397879356).

The spelling of 53177402221 in words is "fifty-three billion, one hundred seventy-seven million, four hundred two thousand, two hundred twenty-one".