221526809054 has 4 divisors (see below), whose sum is σ = 332290213584. Its totient is φ = 110763404526.

The previous prime is 221526809047. The next prime is 221526809219. The reversal of 221526809054 is 450908625122.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 221526808996 and 221526809014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55381702262 + ... + 55381702265.

It is an arithmetic number, because the mean of its divisors is an integer number (83072553396).

Almost surely, 2^221526809054 is an apocalyptic number.

221526809054 is a deficient number, since it is larger than the sum of its proper divisors (110763404530).

221526809054 is a wasteful number, since it uses less digits than its factorization.

221526809054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110763404529.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 221526809054 in words is "two hundred twenty-one billion, five hundred twenty-six million, eight hundred nine thousand, fifty-four".