31400102142 has 40 divisors (see below), whose sum is σ = 70713126000. Its totient is φ = 10414093536.

The previous prime is 31400102137. The next prime is 31400102143. The reversal of 31400102142 is 24120100413.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400102143) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 454767 + ... + 519242.

It is an arithmetic number, because the mean of its divisors is an integer number (1767828150).

Almost surely, 2^31400102142 is an apocalyptic number.

31400102142 is an abundant number, since it is smaller than the sum of its proper divisors (39313023858).

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

31400102142 is a wasteful number, since it uses less digits than its factorization.

31400102142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974222 (or 974213 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31400102142 its reverse (24120100413), we get a palindrome (55520202555).

The spelling of 31400102142 in words is "thirty-one billion, four hundred million, one hundred two thousand, one hundred forty-two".