212471972 has 6 divisors (see below), whose sum is σ = 371825958. Its totient is φ = 106235984.

The previous prime is 212471969. The next prime is 212471981. The reversal of 212471972 is 279174212.

It can be written as a sum of positive squares in only one way, i.e., 147282496 + 65189476 = 12136^2 + 8074^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26558993 + ... + 26559000.

It is an arithmetic number, because the mean of its divisors is an integer number (61970993).

Almost surely, 2^212471972 is an apocalyptic number.

It is an amenable number.

212471972 is a deficient number, since it is larger than the sum of its proper divisors (159353986).

212471972 is a wasteful number, since it uses less digits than its factorization.

212471972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53117997 (or 53117995 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 212471972 is about 14576.4183529425. The cubic root of 212471972 is about 596.7153587733.

The spelling of 212471972 in words is "two hundred twelve million, four hundred seventy-one thousand, nine hundred seventy-two".