30630531 has 4 divisors (see below), whose sum is σ = 40840712. Its totient is φ = 20420352.

The previous prime is 30630529. The next prime is 30630539. The reversal of 30630531 is 13503603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13503603 = 3 ⋅4501201.

It is not a de Polignac number, because 30630531 - 2¹ = 30630529 is a prime.

It is a super-2 number, since 2×30630531² = 1876458858683922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30630498 and 30630507.

It is not an unprimeable number, because it can be changed into a prime (30630539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105086 + ... + 5105091.

It is an arithmetic number, because the mean of its divisors is an integer number (10210178).

Almost surely, 2^30630531 is an apocalyptic number.

30630531 is a deficient number, since it is larger than the sum of its proper divisors (10210181).

30630531 is a wasteful number, since it uses less digits than its factorization.

30630531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210180.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 30630531 is about 5534.4856129545. The cubic root of 30630531 is about 312.8850711232.

The spelling of 30630531 in words is "thirty million, six hundred thirty thousand, five hundred thirty-one".