52161501 has 8 divisors (see below), whose sum is σ = 79484224. Its totient is φ = 29806560.

The previous prime is 52161497. The next prime is 52161503. The reversal of 52161501 is 10516125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52161501 - 2² = 52161497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2483881 = 52161501 / (5 + 2 + 1 + 6 + 1 + 5 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241920 + ... + 1241961.

It is an arithmetic number, because the mean of its divisors is an integer number (9935528).

Almost surely, 2^52161501 is an apocalyptic number.

It is an amenable number.

52161501 is a deficient number, since it is larger than the sum of its proper divisors (27322723).

52161501 is a wasteful number, since it uses less digits than its factorization.

52161501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483891.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 52161501 is about 7222.2919492361. The cubic root of 52161501 is about 373.6371293343.

Adding to 52161501 its reverse (10516125), we get a palindrome (62677626).

The spelling of 52161501 in words is "fifty-two million, one hundred sixty-one thousand, five hundred one".