53457621 has 16 divisors (see below), whose sum is σ = 85747200. Its totient is φ = 28939248.

The previous prime is 53457601. The next prime is 53457623. The reversal of 53457621 is 12675435.

It is not a de Polignac number, because 53457621 - 2¹¹ = 53455573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53457623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66591 + ... + 67388.

It is an arithmetic number, because the mean of its divisors is an integer number (5359200).

Almost surely, 2^53457621 is an apocalyptic number.

It is an amenable number.

53457621 is a deficient number, since it is larger than the sum of its proper divisors (32289579).

53457621 is a wasteful number, since it uses less digits than its factorization.

53457621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134008.

The product of its digits is 25200, while the sum is 33.

The square root of 53457621 is about 7311.4718764418. The cubic root of 53457621 is about 376.7065826426.

The spelling of 53457621 in words is "fifty-three million, four hundred fifty-seven thousand, six hundred twenty-one".