161641524 has 48 divisors (see below), whose sum is σ = 412735680. Its totient is φ = 48829440.

The previous prime is 161641499. The next prime is 161641537. The reversal of 161641524 is 425146161.

It is a super-2 number, since 2×161641524² = 52255964562085152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161641491 and 161641500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44862 + ... + 48330.

It is an arithmetic number, because the mean of its divisors is an integer number (8598660).

Almost surely, 2^161641524 is an apocalyptic number.

It is an amenable number.

161641524 is an abundant number, since it is smaller than the sum of its proper divisors (251094156).

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

161641524 is a wasteful number, since it uses less digits than its factorization.

161641524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840 (or 3838 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 161641524 is about 12713.8319951146. The cubic root of 161641524 is about 544.7337857603.

Adding to 161641524 its reverse (425146161), we get a palindrome (586787685).

It can be divided in two parts, 161641 and 524, that added together give a triangular number (162165 = T₅₆₉).

The spelling of 161641524 in words is "one hundred sixty-one million, six hundred forty-one thousand, five hundred twenty-four".