221534711490 has 16 divisors (see below), whose sum is σ = 531683307648. Its totient is φ = 59075923056.

The previous prime is 221534711467. The next prime is 221534711513. The reversal of 221534711490 is 94117435122.

It is an interprime number because it is at equal distance from previous prime (221534711467) and next prime (221534711513).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692245162 + ... + 3692245221.

It is an arithmetic number, because the mean of its divisors is an integer number (33230206728).

Almost surely, 2^221534711490 is an apocalyptic number.

221534711490 is an abundant number, since it is smaller than the sum of its proper divisors (310148596158).

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

221534711490 is a wasteful number, since it uses less digits than its factorization.

221534711490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384490393.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 221534711490 in words is "two hundred twenty-one billion, five hundred thirty-four million, seven hundred eleven thousand, four hundred ninety".