1620413522 has 16 divisors (see below), whose sum is σ = 2991532992. Its totient is φ = 641042640.

The previous prime is 1620413507. The next prime is 1620413551. The reversal of 1620413522 is 2253140261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 1620413491 and 1620413500.

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, 4451504 + ... + 4451867.

It is an arithmetic number, because the mean of its divisors is an integer number (186970812).

Almost surely, 2^1620413522 is an apocalyptic number.

1620413522 is a deficient number, since it is larger than the sum of its proper divisors (1371119470).

1620413522 is a wasteful number, since it uses less digits than its factorization.

1620413522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8903393.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1620413522 is about 40254.3602855641. The cubic root of 1620413522 is about 1174.5602149538.

Adding to 1620413522 its reverse (2253140261), we get a palindrome (3873553783).

The spelling of 1620413522 in words is "one billion, six hundred twenty million, four hundred thirteen thousand, five hundred twenty-two".