53207421 has 8 divisors (see below), whose sum is σ = 70982400. Its totient is φ = 35452032.

The previous prime is 53207419. The next prime is 53207423. The reversal of 53207421 is 12470235.

It is an interprime number because it is at equal distance from previous prime (53207419) and next prime (53207423).

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

It is not a de Polignac number, because 53207421 - 2¹ = 53207419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53207391 and 53207400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53207423) 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, 3501 + ... + 10893.

It is an arithmetic number, because the mean of its divisors is an integer number (8872800).

Almost surely, 2^53207421 is an apocalyptic number.

It is an amenable number.

53207421 is a deficient number, since it is larger than the sum of its proper divisors (17774979).

53207421 is a wasteful number, since it uses less digits than its factorization.

53207421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9795.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 53207421 is about 7294.3417112170. The cubic root of 53207421 is about 376.1179580298.

Adding to 53207421 its reverse (12470235), we get a palindrome (65677656).

It can be divided in two parts, 53207 and 421, that added together give a triangular number (53628 = T₃₂₇).

The spelling of 53207421 in words is "fifty-three million, two hundred seven thousand, four hundred twenty-one".