220061537 has 4 divisors (see below), whose sum is σ = 220129536. Its totient is φ = 219993540.

The previous prime is 220061521. The next prime is 220061551. The reversal of 220061537 is 735160022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 735160022 = 2 ⋅367580011.

It is a cyclic number.

It is not a de Polignac number, because 220061537 - 2⁴ = 220061521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220061507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28889 + ... + 35702.

It is an arithmetic number, because the mean of its divisors is an integer number (55032384).

Almost surely, 2^220061537 is an apocalyptic number.

It is an amenable number.

220061537 is a deficient number, since it is larger than the sum of its proper divisors (67999).

220061537 is an equidigital number, since it uses as much as digits as its factorization.

220061537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67998.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 220061537 is about 14834.4712409981. The cubic root of 220061537 is about 603.7373543754.

The spelling of 220061537 in words is "two hundred twenty million, sixty-one thousand, five hundred thirty-seven".