52155515 has 4 divisors (see below), whose sum is σ = 62586624. Its totient is φ = 41724408.

The previous prime is 52155511. The next prime is 52155527. The reversal of 52155515 is 51555125.

52155515 = 1304² + 1305² + ... + 1333².

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 52155515 - 2² = 52155511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52155511) 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, 5215547 + ... + 5215556.

It is an arithmetic number, because the mean of its divisors is an integer number (15646656).

Almost surely, 2^52155515 is an apocalyptic number.

52155515 is a deficient number, since it is larger than the sum of its proper divisors (10431109).

52155515 is a wasteful number, since it uses less digits than its factorization.

52155515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10431108.

The product of its digits is 6250, while the sum is 29.

The square root of 52155515 is about 7221.8775259623. The cubic root of 52155515 is about 373.6228360505.

The spelling of 52155515 in words is "fifty-two million, one hundred fifty-five thousand, five hundred fifteen".