31002240030 has 32 divisors (see below), whose sum is σ = 74410697088. Its totient is φ = 8266672800.

The previous prime is 31002239951. The next prime is 31002240037. The reversal of 31002240030 is 3004220013.

It is a super-2 number, since 2×31002240030² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 31002239991 and 31002240009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002240037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534345 + ... + 589515.

It is an arithmetic number, because the mean of its divisors is an integer number (2325334284).

Almost surely, 2^31002240030 is an apocalyptic number.

31002240030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31002240030 is an abundant number, since it is smaller than the sum of its proper divisors (43408457058).

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

31002240030 is a wasteful number, since it uses less digits than its factorization.

31002240030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73912.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 31002240030 its reverse (3004220013), we get a palindrome (34006460043).

The spelling of 31002240030 in words is "thirty-one billion, two million, two hundred forty thousand, thirty".