61528207 has 16 divisors (see below), whose sum is σ = 67465440. Its totient is φ = 55775232.

The previous prime is 61528171. The next prime is 61528223. The reversal of 61528207 is 70282516.

It is a cyclic number.

It is not a de Polignac number, because 61528207 - 2¹⁵ = 61495439 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 (61528277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318703 + ... + 318895.

It is an arithmetic number, because the mean of its divisors is an integer number (4216590).

Almost surely, 2^61528207 is an apocalyptic number.

61528207 is a deficient number, since it is larger than the sum of its proper divisors (5937233).

61528207 is a wasteful number, since it uses less digits than its factorization.

61528207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 61528207 is about 7843.9917771502. The cubic root of 61528207 is about 394.7826759451.

The spelling of 61528207 in words is "sixty-one million, five hundred twenty-eight thousand, two hundred seven".