30101812 has 12 divisors (see below), whose sum is σ = 56730436. Its totient is φ = 13893120.

The previous prime is 30101809. The next prime is 30101843. The reversal of 30101812 is 21810103.

It can be written as a sum of positive squares in 2 ways, for example, as 3825936 + 26275876 = 1956^2 + 5126^2 .

It is a super-2 number, since 2×30101812² = 1812238171366688, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289389 + ... + 289492.

Almost surely, 2^30101812 is an apocalyptic number.

It is an amenable number.

30101812 is a deficient number, since it is larger than the sum of its proper divisors (26628624).

30101812 is a wasteful number, since it uses less digits than its factorization.

30101812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578898 (or 578896 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 30101812 is about 5486.5118244655. The cubic root of 30101812 is about 311.0743576575.

Adding to 30101812 its reverse (21810103), we get a palindrome (51911915).

The spelling of 30101812 in words is "thirty million, one hundred one thousand, eight hundred twelve".