145540422 has 32 divisors (see below), whose sum is σ = 323913600. Its totient is φ = 48439944.

The previous prime is 145540387. The next prime is 145540427. The reversal of 145540422 is 224045541.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145540427) 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, 43029 + ... + 46287.

It is an arithmetic number, because the mean of its divisors is an integer number (10122300).

Almost surely, 2^145540422 is an apocalyptic number.

145540422 is an abundant number, since it is smaller than the sum of its proper divisors (178373178).

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

145540422 is a wasteful number, since it uses less digits than its factorization.

145540422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4091 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 145540422 is about 12064.0135112656. The cubic root of 145540422 is about 526.0106572559.

Adding to 145540422 its reverse (224045541), we get a palindrome (369585963).

The spelling of 145540422 in words is "one hundred forty-five million, five hundred forty thousand, four hundred twenty-two".