5621520042 has 20 divisors (see below), whose sum is σ = 12596369346. Its totient is φ = 1873839960.

The previous prime is 5621519977. The next prime is 5621520049. The reversal of 5621520042 is 2400251265.

It can be written as a sum of positive squares in only one way, i.e., 5619151521 + 2368521 = 74961^2 + 1539^2 .

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 = 5621519988 and 5621520015.

It is not an unprimeable number, because it can be changed into a prime (5621520049) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17350209 + ... + 17350532.

Almost surely, 2^5621520042 is an apocalyptic number.

5621520042 is an abundant number, since it is smaller than the sum of its proper divisors (6974849304).

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

5621520042 is a wasteful number, since it uses less digits than its factorization.

5621520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34700755 (or 34700746 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 5621520042 is about 74976.7966907096. The cubic root of 5621520042 is about 1778.0798257934.

The spelling of 5621520042 in words is "five billion, six hundred twenty-one million, five hundred twenty thousand, forty-two".