81202030 has 128 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 23224320.

The previous prime is 81202027. The next prime is 81202031. The reversal of 81202030 is 3020218.

It is a happy number.

It is a super-2 number, since 2×81202030² = 13187539352241800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81201995 and 81202013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81202031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 448540 + ... + 448720.

It is an arithmetic number, because the mean of its divisors is an integer number (1547910).

Almost surely, 2^81202030 is an apocalyptic number.

81202030 is an abundant number, since it is smaller than the sum of its proper divisors (116930450).

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

81202030 is a wasteful number, since it uses less digits than its factorization.

81202030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 81202030 is about 9011.2168989543. The cubic root of 81202030 is about 433.0342979622.

Adding to 81202030 its reverse (3020218), we get a palindrome (84222248).

It can be divided in two parts, 8120 and 2030, that multiplied together give a square (16483600 = 4060²).

The spelling of 81202030 in words is "eighty-one million, two hundred two thousand, thirty".