145312021434 has 16 divisors (see below), whose sum is σ = 292574541600. Its totient is φ = 48112257360.

The previous prime is 145312021429. The next prime is 145312021457. The reversal of 145312021434 is 434120213541.

It is a super-2 number, since 2×145312021434² (a number of 23 digits) contains 22 as substring.

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, 81269812 + ... + 81271599.

It is an arithmetic number, because the mean of its divisors is an integer number (18285908850).

Almost surely, 2^145312021434 is an apocalyptic number.

145312021434 is an abundant number, since it is smaller than the sum of its proper divisors (147262520166).

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

145312021434 is a wasteful number, since it uses less digits than its factorization.

145312021434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162541565.

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

Adding to 145312021434 its reverse (434120213541), we get a palindrome (579432234975).

The spelling of 145312021434 in words is "one hundred forty-five billion, three hundred twelve million, twenty-one thousand, four hundred thirty-four".