1642223154 has 64 divisors (see below), whose sum is σ = 4085665920. Its totient is φ = 432337920.

The previous prime is 1642223147. The next prime is 1642223159. The reversal of 1642223154 is 4513222461.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1642223159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41709 + ... + 70880.

It is an arithmetic number, because the mean of its divisors is an integer number (63838530).

Almost surely, 2^1642223154 is an apocalyptic number.

1642223154 is an abundant number, since it is smaller than the sum of its proper divisors (2443442766).

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

1642223154 is a wasteful number, since it uses less digits than its factorization.

1642223154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112635.

The product of its digits is 11520, while the sum is 30.

The square root of 1642223154 is about 40524.3526043292. The cubic root of 1642223154 is about 1179.8063346824.

The spelling of 1642223154 in words is "one billion, six hundred forty-two million, two hundred twenty-three thousand, one hundred fifty-four".