30772531 has 2 divisors, whose sum is σ = 30772532. Its totient is φ = 30772530.

The previous prime is 30772519. The next prime is 30772541. The reversal of 30772531 is 13527703.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30772531 - 2¹¹ = 30770483 is a prime.

It is a super-2 number, since 2×30772531² = 1893897328291922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30772531.

It is not a weakly prime, because it can be changed into another prime (30772501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15386265 + 15386266.

It is an arithmetic number, because the mean of its divisors is an integer number (15386266).

Almost surely, 2^30772531 is an apocalyptic number.

30772531 is a deficient number, since it is larger than the sum of its proper divisors (1).

30772531 is an equidigital number, since it uses as much as digits as its factorization.

30772531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 30772531 is about 5547.2994330575. The cubic root of 30772531 is about 313.3678269204.

The spelling of 30772531 in words is "thirty million, seven hundred seventy-two thousand, five hundred thirty-one".