53020551 has 4 divisors (see below), whose sum is σ = 70694072. Its totient is φ = 35347032.

The previous prime is 53020549. The next prime is 53020553. The reversal of 53020551 is 15502035.

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

It is an interprime number because it is at equal distance from previous prime (53020549) and next prime (53020553).

It is not a de Polignac number, because 53020551 - 2¹ = 53020549 is a prime.

It is a super-2 number, since 2×53020551² = 5622357656687202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53020553) 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, 8836756 + ... + 8836761.

It is an arithmetic number, because the mean of its divisors is an integer number (17673518).

Almost surely, 2^53020551 is an apocalyptic number.

53020551 is a deficient number, since it is larger than the sum of its proper divisors (17673521).

53020551 is a wasteful number, since it uses less digits than its factorization.

53020551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17673520.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 53020551 is about 7281.5212009579. The cubic root of 53020551 is about 375.6771197322.

Adding to 53020551 its reverse (15502035), we get a palindrome (68522586).

The spelling of 53020551 in words is "fifty-three million, twenty thousand, five hundred fifty-one".