53152781 has 4 divisors (see below), whose sum is σ = 57984864. Its totient is φ = 48320700.

The previous prime is 53152763. The next prime is 53152787. The reversal of 53152781 is 18725135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53152781 - 2⁶ = 53152717 is a prime.

It is a super-2 number, since 2×53152781² = 5650436256067922, 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 (53152787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2416025 + ... + 2416046.

It is an arithmetic number, because the mean of its divisors is an integer number (14496216).

Almost surely, 2^53152781 is an apocalyptic number.

It is an amenable number.

53152781 is a deficient number, since it is larger than the sum of its proper divisors (4832083).

53152781 is a wasteful number, since it uses less digits than its factorization.

53152781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832082.

The product of its digits is 8400, while the sum is 32.

The square root of 53152781 is about 7290.5953803513. The cubic root of 53152781 is about 375.9891656943.

The spelling of 53152781 in words is "fifty-three million, one hundred fifty-two thousand, seven hundred eighty-one".