53261520 has 160 divisors (see below), whose sum is σ = 182404992. Its totient is φ = 12773376.

The previous prime is 53261519. The next prime is 53261521. The reversal of 53261520 is 2516235.

It is an interprime number because it is at equal distance from previous prime (53261519) and next prime (53261521).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53261521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133962 + ... + 134358.

Almost surely, 2^53261520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53261520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91202496).

53261520 is an abundant number, since it is smaller than the sum of its proper divisors (129143472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53261520 is a wasteful number, since it uses less digits than its factorization.

53261520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 53261520 is about 7298.0490543706. The cubic root of 53261520 is about 376.2453883314.

Adding to 53261520 its reverse (2516235), we get a palindrome (55777755).

The spelling of 53261520 in words is "fifty-three million, two hundred sixty-one thousand, five hundred twenty".