221534710047640 has 32 divisors (see below), whose sum is σ = 543767015572560. Its totient is φ = 80558076380800.

The previous prime is 221534710047611. The next prime is 221534710047661. The reversal of 221534710047640 is 46740017435122.

It is a happy number.

It is a congruent 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, 251743988251 + ... + 251743989130.

Almost surely, 2^{221534710047640} is an apocalyptic number.

221534710047640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221534710047640 is an abundant number, since it is smaller than the sum of its proper divisors (322232305524920).

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

221534710047640 is a wasteful number, since it uses less digits than its factorization.

221534710047640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503487977403 (or 503487977399 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 221534710047640 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, seven hundred ten million, forty-seven thousand, six hundred forty".