30055021531 has 16 divisors (see below), whose sum is σ = 32357402208. Its totient is φ = 27812390400.

The previous prime is 30055021511. The next prime is 30055021547. The reversal of 30055021531 is 13512055003.

It is a cyclic number.

It is not a de Polignac number, because 30055021531 - 2⁹ = 30055021019 is a prime.

It is a super-2 number, since 2×30055021531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30055021496 and 30055021505.

It is not an unprimeable number, because it can be changed into a prime (30055021511) 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, 3939901 + ... + 3947521.

It is an arithmetic number, because the mean of its divisors is an integer number (2022337638).

Almost surely, 2^30055021531 is an apocalyptic number.

30055021531 is a deficient number, since it is larger than the sum of its proper divisors (2302380677).

30055021531 is a wasteful number, since it uses less digits than its factorization.

30055021531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11502.

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 30055021531 its reverse (13512055003), we get a palindrome (43567076534).

The spelling of 30055021531 in words is "thirty billion, fifty-five million, twenty-one thousand, five hundred thirty-one".