212254540 has 24 divisors (see below), whose sum is σ = 456607872. Its totient is φ = 82830720.

The previous prime is 212254519. The next prime is 212254541. The reversal of 212254540 is 45452212.

It is a super-2 number, since 2×212254540² = 90103979501223200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212254541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128604 + ... + 130243.

It is an arithmetic number, because the mean of its divisors is an integer number (19025328).

Almost surely, 2^212254540 is an apocalyptic number.

212254540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212254540 is an abundant number, since it is smaller than the sum of its proper divisors (244353332).

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

212254540 is a wasteful number, since it uses less digits than its factorization.

212254540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258897 (or 258895 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 212254540 is about 14568.9580958969. The cubic root of 212254540 is about 596.5117408627.

The spelling of 212254540 in words is "two hundred twelve million, two hundred fifty-four thousand, five hundred forty".