212398767540 has 48 divisors (see below), whose sum is σ = 660796167360. Its totient is φ = 56639671200.

The previous prime is 212398767509. The next prime is 212398767551. The reversal of 212398767540 is 45767893212.

It is a happy number.

212398767540 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 98 + 7 + 6 + 7 + 540 = 666.

It is a super-2 number, since 2×212398767540² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196664986 + ... + 196666065.

It is an arithmetic number, because the mean of its divisors is an integer number (13766586820).

It is a 1-persistent number, because it is pandigital, but 2⋅212398767540 = 424797535080 is not.

Almost surely, 2^212398767540 is an apocalyptic number.

212398767540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212398767540 is an abundant number, since it is smaller than the sum of its proper divisors (448397399820).

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

212398767540 is a wasteful number, since it uses less digits than its factorization.

212398767540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393331069 (or 393331061 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 212398767540 in words is "two hundred twelve billion, three hundred ninety-eight million, seven hundred sixty-seven thousand, five hundred forty".