31020030030 has 128 divisors (see below), whose sum is σ = 86102839296. Its totient is φ = 7080652800.

The previous prime is 31020029987. The next prime is 31020030073. The reversal of 31020030030 is 3003002013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31020029987) and next prime (31020030073).

It is a junction number, because it is equal to n+sod(n) for n = 31020029988 and 31020030015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 337534 + ... + 419486.

It is an arithmetic number, because the mean of its divisors is an integer number (672678432).

Almost surely, 2^31020030030 is an apocalyptic number.

31020030030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020030030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43051419648).

31020030030 is an abundant number, since it is smaller than the sum of its proper divisors (55082809266).

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

31020030030 is a wasteful number, since it uses less digits than its factorization.

31020030030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82042.

The product of its (nonzero) digits is 54, while the sum is 12.

Adding to 31020030030 its reverse (3003002013), we get a palindrome (34023032043).

The spelling of 31020030030 in words is "thirty-one billion, twenty million, thirty thousand, thirty".