102213770 has 8 divisors (see below), whose sum is σ = 183984804. Its totient is φ = 40885504.

The previous prime is 102213743. The next prime is 102213773. The reversal of 102213770 is 77312201.

It can be written as a sum of positive squares in 2 ways, for example, as 96845281 + 5368489 = 9841^2 + 2317^2 .

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

It is a super-2 number, since 2×102213770² = 20895309555225800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102213773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110679 + ... + 5110698.

Almost surely, 2^102213770 is an apocalyptic number.

102213770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102213770 is a deficient number, since it is larger than the sum of its proper divisors (81771034).

102213770 is a wasteful number, since it uses less digits than its factorization.

102213770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221384.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 102213770 is about 10110.0825911562. The cubic root of 102213770 is about 467.5590515167.

Adding to 102213770 its reverse (77312201), we get a palindrome (179525971).

The spelling of 102213770 in words is "one hundred two million, two hundred thirteen thousand, seven hundred seventy".