210388502142 has 64 divisors (see below), whose sum is σ = 575421557760. Its totient is φ = 55487076192.

The previous prime is 210388502113. The next prime is 210388502143. The reversal of 210388502142 is 241205883012.

It is a happy number.

210388502142 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 8 + 8 + 502 + 142 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 210388502097 and 210388502106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210388502143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21402138 + ... + 21411965.

It is an arithmetic number, because the mean of its divisors is an integer number (8990961840).

Almost surely, 2^210388502142 is an apocalyptic number.

210388502142 is an abundant number, since it is smaller than the sum of its proper divisors (365033055618).

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

210388502142 is a wasteful number, since it uses less digits than its factorization.

210388502142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42814134 (or 42814128 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 210388502142 in words is "two hundred ten billion, three hundred eighty-eight million, five hundred two thousand, one hundred forty-two".