31123023143430 has 64 divisors (see below), whose sum is σ = 74729014483968. Its totient is φ = 8295722497920.

The previous prime is 31123023143423. The next prime is 31123023143447. The reversal of 31123023143430 is 3434132032113.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

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, 1602535120 + ... + 1602554540.

It is an arithmetic number, because the mean of its divisors is an integer number (1167640851312).

Almost surely, 2^{31123023143430} is an apocalyptic number.

31123023143430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31123023143430 is an abundant number, since it is smaller than the sum of its proper divisors (43605991340538).

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

31123023143430 is a wasteful number, since it uses less digits than its factorization.

31123023143430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40821.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 31123023143430 its reverse (3434132032113), we get a palindrome (34557155175543).

The spelling of 31123023143430 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-three million, one hundred forty-three thousand, four hundred thirty".