1520022540 has 48 divisors (see below), whose sum is σ = 4258275840. Its totient is φ = 405128640.

The previous prime is 1520022529. The next prime is 1520022587. The reversal of 1520022540 is 452200251.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134925 + ... + 145755.

It is an arithmetic number, because the mean of its divisors is an integer number (88714080).

Almost surely, 2^1520022540 is an apocalyptic number.

1520022540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520022540 is an abundant number, since it is smaller than the sum of its proper divisors (2738253300).

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

1520022540 is a wasteful number, since it uses less digits than its factorization.

1520022540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13182 (or 13180 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1520022540 is about 38987.4664475649. The cubic root of 1520022540 is about 1149.7850991004.

Adding to 1520022540 its reverse (452200251), we get a palindrome (1972222791).

The spelling of 1520022540 in words is "one billion, five hundred twenty million, twenty-two thousand, five hundred forty".