1520220445 has 8 divisors (see below), whose sum is σ = 1831898880. Its totient is φ = 1211086800.

The previous prime is 1520220431. The next prime is 1520220451. The reversal of 1520220445 is 5440220251.

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

It is not a de Polignac number, because 1520220445 - 2¹⁵ = 1520187677 is a prime.

It is a super-2 number, since 2×1520220445² = 4622140402791996050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 634881 + ... + 637270.

It is an arithmetic number, because the mean of its divisors is an integer number (228987360).

Almost surely, 2^1520220445 is an apocalyptic number.

It is an amenable number.

1520220445 is a deficient number, since it is larger than the sum of its proper divisors (311678435).

1520220445 is a wasteful number, since it uses less digits than its factorization.

1520220445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272395.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1520220445 is about 38990.0044242111. The cubic root of 1520220445 is about 1149.8349971203.

Adding to 1520220445 its reverse (5440220251), we get a palindrome (6960440696).

The spelling of 1520220445 in words is "one billion, five hundred twenty million, two hundred twenty thousand, four hundred forty-five".