212309734 has 64 divisors (see below), whose sum is σ = 415650816. Its totient is φ = 79035264.

The previous prime is 212309729. The next prime is 212309749. The reversal of 212309734 is 437903212.

It is a junction number, because it is equal to n+sod(n) for n = 212309696 and 212309705.

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, 280084 + ... + 280840.

It is an arithmetic number, because the mean of its divisors is an integer number (6494544).

Almost surely, 2^212309734 is an apocalyptic number.

212309734 is a deficient number, since it is larger than the sum of its proper divisors (203341082).

212309734 is a wasteful number, since it uses less digits than its factorization.

212309734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 212309734 is about 14570.8522056879. The cubic root of 212309734 is about 596.5634413911.

The spelling of 212309734 in words is "two hundred twelve million, three hundred nine thousand, seven hundred thirty-four".