1540223532 has 48 divisors (see below), whose sum is σ = 3995873280. Its totient is φ = 513060624.

The previous prime is 1540223501. The next prime is 1540223533. The reversal of 1540223532 is 2353220451.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1540223496 and 1540223505.

It is not an unprimeable number, because it can be changed into a prime (1540223533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192973 + ... + 200795.

It is an arithmetic number, because the mean of its divisors is an integer number (83247360).

Almost surely, 2^1540223532 is an apocalyptic number.

1540223532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1540223532 is an abundant number, since it is smaller than the sum of its proper divisors (2455649748).

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

1540223532 is a wasteful number, since it uses less digits than its factorization.

1540223532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9659 (or 9651 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1540223532 is about 39245.6816987551. The cubic root of 1540223532 is about 1154.8562209287.

Adding to 1540223532 its reverse (2353220451), we get a palindrome (3893443983).

The spelling of 1540223532 in words is "one billion, five hundred forty million, two hundred twenty-three thousand, five hundred thirty-two".