212151742 has 8 divisors (see below), whose sum is σ = 347157432. Its totient is φ = 96432600.

The previous prime is 212151691. The next prime is 212151757. The reversal of 212151742 is 247151212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4821609 + ... + 4821652.

It is an arithmetic number, because the mean of its divisors is an integer number (43394679).

Almost surely, 2^212151742 is an apocalyptic number.

212151742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212151742 is a deficient number, since it is larger than the sum of its proper divisors (135005690).

212151742 is a wasteful number, since it uses less digits than its factorization.

212151742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643274.

The product of its digits is 1120, while the sum is 25.

The square root of 212151742 is about 14565.4296881348. The cubic root of 212151742 is about 596.4154255047.

The spelling of 212151742 in words is "two hundred twelve million, one hundred fifty-one thousand, seven hundred forty-two".