52291487 has 4 divisors (see below), whose sum is σ = 52363560. Its totient is φ = 52219416.

The previous prime is 52291469. The next prime is 52291511. The reversal of 52291487 is 78419225.

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 52291487 - 2¹⁰ = 52290463 is a prime.

It is a super-2 number, since 2×52291487² = 5468799225342338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52291487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52291087) 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, 34937 + ... + 36402.

It is an arithmetic number, because the mean of its divisors is an integer number (13090890).

Almost surely, 2^52291487 is an apocalyptic number.

52291487 is a deficient number, since it is larger than the sum of its proper divisors (72073).

52291487 is an equidigital number, since it uses as much as digits as its factorization.

52291487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72072.

The product of its digits is 40320, while the sum is 38.

The square root of 52291487 is about 7231.2852937773. The cubic root of 52291487 is about 373.9472386894.

The spelling of 52291487 in words is "fifty-two million, two hundred ninety-one thousand, four hundred eighty-seven".