402251554410221 has 16 divisors (see below), whose sum is σ = 406473957122688. Its totient is φ = 398040867840000.

The previous prime is 402251554410193. The next prime is 402251554410259. The reversal of 402251554410221 is 122014455152204.

It is a cyclic number.

It is not a de Polignac number, because 402251554410221 - 2¹⁸ = 402251554148077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402251554610221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032047840 + ... + 1032437526.

It is an arithmetic number, because the mean of its divisors is an integer number (25404622320168).

Almost surely, 2^{402251554410221} is an apocalyptic number.

It is an amenable number.

402251554410221 is a deficient number, since it is larger than the sum of its proper divisors (4222402712467).

402251554410221 is a wasteful number, since it uses less digits than its factorization.

402251554410221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404692.

The product of its (nonzero) digits is 128000, while the sum is 38.

The spelling of 402251554410221 in words is "four hundred two trillion, two hundred fifty-one billion, five hundred fifty-four million, four hundred ten thousand, two hundred twenty-one".