213449266440 has 96 divisors (see below), whose sum is σ = 697864265280. Its totient is φ = 56578951296.

The previous prime is 213449266427. The next prime is 213449266453. The reversal of 213449266440 is 44662944312.

213449266440 is a `hidden beast` number, since 2 + 1 + 344 + 9 + 266 + 4 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (213449266427) and next prime (213449266453).

It is a super-2 number, since 2×213449266440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1715074 + ... + 1835313.

It is an arithmetic number, because the mean of its divisors is an integer number (7269419430).

Almost surely, 2^213449266440 is an apocalyptic number.

213449266440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213449266440 is an abundant number, since it is smaller than the sum of its proper divisors (484414998840).

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

213449266440 is a wasteful number, since it uses less digits than its factorization.

213449266440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550571 (or 3550564 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 213449266440 in words is "two hundred thirteen billion, four hundred forty-nine million, two hundred sixty-six thousand, four hundred forty".