215749451010 has 64 divisors (see below), whose sum is σ = 534583701504. Its totient is φ = 55668753600.

The previous prime is 215749450993. The next prime is 215749451023. The reversal of 215749451010 is 10154947512.

It is a happy number.

215749451010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215749451010² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215749451010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8009665 + ... + 8036555.

It is an arithmetic number, because the mean of its divisors is an integer number (8352870336).

Almost surely, 2^215749451010 is an apocalyptic number.

215749451010 is an abundant number, since it is smaller than the sum of its proper divisors (318834250494).

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

215749451010 is a wasteful number, since it uses less digits than its factorization.

215749451010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35559.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 215749451010 in words is "two hundred fifteen billion, seven hundred forty-nine million, four hundred fifty-one thousand, ten".