1621500052 has 48 divisors (see below), whose sum is σ = 3185784000. Its totient is φ = 717617664.

The previous prime is 1621500019. The next prime is 1621500091. The reversal of 1621500052 is 2500051261.

It is a junction number, because it is equal to n+sod(n) for n = 1621499996 and 1621500032.

It is a congruent 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, 175074 + ... + 184102.

It is an arithmetic number, because the mean of its divisors is an integer number (66370500).

Almost surely, 2^1621500052 is an apocalyptic number.

It is an amenable number.

1621500052 is a deficient number, since it is larger than the sum of its proper divisors (1564283948).

1621500052 is a wasteful number, since it uses less digits than its factorization.

1621500052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208 (or 9206 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1621500052 is about 40267.8538290781. The cubic root of 1621500052 is about 1174.8226808323.

The spelling of 1621500052 in words is "one billion, six hundred twenty-one million, five hundred thousand, fifty-two".