53072551 has 4 divisors (see below), whose sum is σ = 60654352. Its totient is φ = 45490752.

The previous prime is 53072549. The next prime is 53072587. The reversal of 53072551 is 15527035.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53072551 - 2¹ = 53072549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53072051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3790890 + ... + 3790903.

It is an arithmetic number, because the mean of its divisors is an integer number (15163588).

Almost surely, 2^53072551 is an apocalyptic number.

53072551 is a deficient number, since it is larger than the sum of its proper divisors (7581801).

53072551 is an equidigital number, since it uses as much as digits as its factorization.

53072551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581800.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 53072551 is about 7285.0910083540. The cubic root of 53072551 is about 375.7998949388.

Adding to 53072551 its reverse (15527035), we get a palindrome (68599586).

The spelling of 53072551 in words is "fifty-three million, seventy-two thousand, five hundred fifty-one".