1523220061 has 16 divisors (see below), whose sum is σ = 1718212608. Its totient is φ = 1337799600.

The previous prime is 1523220059. The next prime is 1523220071. The reversal of 1523220061 is 1600223251.

It is a cyclic number.

It is not a de Polignac number, because 1523220061 - 2¹ = 1523220059 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 (1523220031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215790 + ... + 222736.

It is an arithmetic number, because the mean of its divisors is an integer number (107388288).

Almost surely, 2^1523220061 is an apocalyptic number.

1523220061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1523220061 is a deficient number, since it is larger than the sum of its proper divisors (194992547).

1523220061 is a wasteful number, since it uses less digits than its factorization.

1523220061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1523220061 is about 39028.4519421409. The cubic root of 1523220061 is about 1150.5907641427.

The spelling of 1523220061 in words is "one billion, five hundred twenty-three million, two hundred twenty thousand, sixty-one".