1520534022420 has 288 divisors, whose sum is σ = 4978503105408. Its totient is φ = 345737161728.

The previous prime is 1520534022419. The next prime is 1520534022439. The reversal of 1520534022420 is 242204350251.

It is a super-3 number, since 3×1520534022420³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 663118794 + ... + 663121086.

It is an arithmetic number, because the mean of its divisors is an integer number (17286469116).

Almost surely, 2^{1520534022420} is an apocalyptic number.

1520534022420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520534022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2489251552704).

1520534022420 is an abundant number, since it is smaller than the sum of its proper divisors (3457969082988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520534022420 is a wasteful number, since it uses less digits than its factorization.

1520534022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3390 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 1520534022420 its reverse (242204350251), we get a palindrome (1762738372671).

The spelling of 1520534022420 in words is "one trillion, five hundred twenty billion, five hundred thirty-four million, twenty-two thousand, four hundred twenty".