53213657 has 12 divisors (see below), whose sum is σ = 62257680. Its totient is φ = 45349416.

The previous prime is 53213653. The next prime is 53213663. The reversal of 53213657 is 75631235.

It is not a de Polignac number, because 53213657 - 2² = 53213653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53213653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5738 + ... + 11804.

It is an arithmetic number, because the mean of its divisors is an integer number (5188140).

Almost surely, 2^53213657 is an apocalyptic number.

It is an amenable number.

53213657 is a deficient number, since it is larger than the sum of its proper divisors (9044023).

53213657 is a wasteful number, since it uses less digits than its factorization.

53213657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260 (or 6253 counting only the distinct ones).

The product of its digits is 18900, while the sum is 32.

The square root of 53213657 is about 7294.7691533043. The cubic root of 53213657 is about 376.1326513433.

The spelling of 53213657 in words is "fifty-three million, two hundred thirteen thousand, six hundred fifty-seven".