212429139 has 32 divisors (see below), whose sum is σ = 322533120. Its totient is φ = 123285888.

The previous prime is 212429111. The next prime is 212429167. The reversal of 212429139 is 931924212.

212429139 is nontrivially palindromic in base 2.

212429139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212429111) and next prime (212429167).

It is not a de Polignac number, because 212429139 - 2⁹ = 212428627 is a prime.

It is a super-2 number, since 2×212429139² = 90252278192562642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212429179) 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, 209197 + ... + 210209.

It is an arithmetic number, because the mean of its divisors is an integer number (10079160).

Almost surely, 2^212429139 is an apocalyptic number.

212429139 is a deficient number, since it is larger than the sum of its proper divisors (110103981).

212429139 is a wasteful number, since it uses less digits than its factorization.

212429139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 7776, while the sum is 33.

The square root of 212429139 is about 14574.9490222093. The cubic root of 212429139 is about 596.6752580698.

It can be divided in two parts, 21242 and 9139, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 212429139 in words is "two hundred twelve million, four hundred twenty-nine thousand, one hundred thirty-nine".