31200402030 has 64 divisors (see below), whose sum is σ = 85651388928. Its totient is φ = 7125425280.

The previous prime is 31200402019. The next prime is 31200402041. The reversal of 31200402030 is 3020400213.

It is an interprime number because it is at equal distance from previous prime (31200402019) and next prime (31200402041).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185109 + ... + 310911.

It is an arithmetic number, because the mean of its divisors is an integer number (1338302952).

Almost surely, 2^31200402030 is an apocalyptic number.

31200402030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31200402030 is an abundant number, since it is smaller than the sum of its proper divisors (54450986898).

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

31200402030 is a wasteful number, since it uses less digits than its factorization.

31200402030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127001.

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

Adding to 31200402030 its reverse (3020400213), we get a palindrome (34220802243).

The spelling of 31200402030 in words is "thirty-one billion, two hundred million, four hundred two thousand, thirty".