1522222440 has 32 divisors (see below), whose sum is σ = 4566667680. Its totient is φ = 405925952.

The previous prime is 1522222369. The next prime is 1522222451. The reversal of 1522222440 is 442222251.

It is a super-2 number, since 2×1522222440² = 4634322313679107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1522222440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6342474 + ... + 6342713.

It is an arithmetic number, because the mean of its divisors is an integer number (142708365).

Almost surely, 2^1522222440 is an apocalyptic number.

1522222440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1522222440 is an abundant number, since it is smaller than the sum of its proper divisors (3044445240).

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

1522222440 is a wasteful number, since it uses less digits than its factorization.

1522222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12685201 (or 12685197 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1522222440 is about 39015.6691599670. The cubic root of 1522222440 is about 1150.3395191602.

Adding to 1522222440 its reverse (442222251), we get a palindrome (1964444691).

The spelling of 1522222440 in words is "one billion, five hundred twenty-two million, two hundred twenty-two thousand, four hundred forty".