53111421 has 12 divisors (see below), whose sum is σ = 83690880. Its totient is φ = 32188680.

The previous prime is 53111389. The next prime is 53111423. The reversal of 53111421 is 12411135.

53111421 is a `hidden beast` number, since 531 + 114 + 21 = 666.

It is not a de Polignac number, because 53111421 - 2⁵ = 53111389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53111394 and 53111403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53111423) 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, 268141 + ... + 268338.

It is an arithmetic number, because the mean of its divisors is an integer number (6974240).

Almost surely, 2^53111421 is an apocalyptic number.

It is an amenable number.

53111421 is a deficient number, since it is larger than the sum of its proper divisors (30579459).

53111421 is a wasteful number, since it uses less digits than its factorization.

53111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536496 (or 536493 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 53111421 is about 7287.7582973093. The cubic root of 53111421 is about 375.8916170373.

Adding to 53111421 its reverse (12411135), we get a palindrome (65522556).

It can be divided in two parts, 531114 and 21, that added together give a palindrome (531135).

The spelling of 53111421 in words is "fifty-three million, one hundred eleven thousand, four hundred twenty-one".