52215490 has 8 divisors (see below), whose sum is σ = 93987900. Its totient is φ = 20886192.

The previous prime is 52215479. The next prime is 52215491. The reversal of 52215490 is 9451225.

It can be written as a sum of positive squares in 2 ways, for example, as 47238129 + 4977361 = 6873^2 + 2231^2 .

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

It is not an unprimeable number, because it can be changed into a prime (52215491) 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, 2610765 + ... + 2610784.

Almost surely, 2^52215490 is an apocalyptic number.

52215490 is a deficient number, since it is larger than the sum of its proper divisors (41772410).

52215490 is a wasteful number, since it uses less digits than its factorization.

52215490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221556.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 52215490 is about 7226.0286464973. The cubic root of 52215490 is about 373.7659941031.

Adding to 52215490 its product of nonzero digits (3600), we get a triangular number (52219090 = T₁₀₂₁₉).

The spelling of 52215490 in words is "fifty-two million, two hundred fifteen thousand, four hundred ninety".