52390481 has 32 divisors (see below), whose sum is σ = 68076288. Its totient is φ = 39536640.

The previous prime is 52390463. The next prime is 52390487. The reversal of 52390481 is 18409325.

It is not a de Polignac number, because 52390481 - 2²² = 48196177 is a prime.

It is a super-2 number, since 2×52390481² = 5489524998822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52390487) 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, 55445 + ... + 56381.

It is an arithmetic number, because the mean of its divisors is an integer number (2127384).

Almost surely, 2^52390481 is an apocalyptic number.

It is an amenable number.

52390481 is a deficient number, since it is larger than the sum of its proper divisors (15685807).

52390481 is a wasteful number, since it uses less digits than its factorization.

52390481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 52390481 is about 7238.1268985836. The cubic root of 52390481 is about 374.1830654587.

The spelling of 52390481 in words is "fifty-two million, three hundred ninety thousand, four hundred eighty-one".