101215040 has 28 divisors (see below), whose sum is σ = 241019076. Its totient is φ = 40485888.

The previous prime is 101215003. The next prime is 101215057. The reversal of 101215040 is 40512101.

It can be written as a sum of positive squares in 2 ways, for example, as 20502784 + 80712256 = 4528^2 + 8984^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157829 + ... + 158468.

Almost surely, 2^101215040 is an apocalyptic number.

101215040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101215040 is an abundant number, since it is smaller than the sum of its proper divisors (139804036).

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

101215040 is an equidigital number, since it uses as much as digits as its factorization.

101215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316314 (or 316304 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 101215040 is about 10060.5685724019. The cubic root of 101215040 is about 466.0312258420.

Adding to 101215040 its reverse (40512101), we get a palindrome (141727141).

The spelling of 101215040 in words is "one hundred one million, two hundred fifteen thousand, forty".