53521357 has 2 divisors, whose sum is σ = 53521358. Its totient is φ = 53521356.

The previous prime is 53521333. The next prime is 53521373. The reversal of 53521357 is 75312535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52722121 + 799236 = 7261^2 + 894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53521357 is a prime.

It is equal to p_3199324 and since 53521357 and 3199324 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53521387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26760678 + 26760679.

It is an arithmetic number, because the mean of its divisors is an integer number (26760679).

Almost surely, 2^53521357 is an apocalyptic number.

It is an amenable number.

53521357 is a deficient number, since it is larger than the sum of its proper divisors (1).

53521357 is an equidigital number, since it uses as much as digits as its factorization.

53521357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15750, while the sum is 31.

The square root of 53521357 is about 7315.8292079572. The cubic root of 53521357 is about 376.8562353617.

The spelling of 53521357 in words is "fifty-three million, five hundred twenty-one thousand, three hundred fifty-seven".