53144441021 has 6 divisors (see below), whose sum is σ = 61821084510. Its totient is φ = 45552377976.

The previous prime is 53144441003. The next prime is 53144441069. The reversal of 53144441021 is 12014444135.

It can be written as a sum of positive squares in only one way, i.e., 28388880100 + 24755560921 = 168490^2 + 157339^2 .

It is not a de Polignac number, because 53144441021 - 2³⁴ = 35964571837 is a prime.

It is a super-2 number, since 2×53144441021² (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 (53144441221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 542290166 + ... + 542290263.

It is an arithmetic number, because the mean of its divisors is an integer number (10303514085).

Almost surely, 2^53144441021 is an apocalyptic number.

It is an amenable number.

53144441021 is a deficient number, since it is larger than the sum of its proper divisors (8676643489).

53144441021 is a wasteful number, since it uses less digits than its factorization.

53144441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084580443 (or 1084580436 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 53144441021 its reverse (12014444135), we get a palindrome (65158885156).

The spelling of 53144441021 in words is "fifty-three billion, one hundred forty-four million, four hundred forty-one thousand, twenty-one".