52140261 has 4 divisors (see below), whose sum is σ = 69520352. Its totient is φ = 34760172.

The previous prime is 52140211. The next prime is 52140293. The reversal of 52140261 is 16204125.

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 not a de Polignac number, because 52140261 - 2⁷ = 52140133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52140211) 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, 8690041 + ... + 8690046.

It is an arithmetic number, because the mean of its divisors is an integer number (17380088).

Almost surely, 2^52140261 is an apocalyptic number.

It is an amenable number.

52140261 is a deficient number, since it is larger than the sum of its proper divisors (17380091).

52140261 is a wasteful number, since it uses less digits than its factorization.

52140261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380090.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 52140261 is about 7220.8213521732. The cubic root of 52140261 is about 373.5864078258.

Adding to 52140261 its reverse (16204125), we get a palindrome (68344386).

The spelling of 52140261 in words is "fifty-two million, one hundred forty thousand, two hundred sixty-one".