1601211534 has 32 divisors (see below), whose sum is σ = 3468727584. Its totient is φ = 489828480.

The previous prime is 1601211533. The next prime is 1601211541. The reversal of 1601211534 is 4351121061.

It is a happy number.

It is a super-2 number, since 2×1601211534² = 5127756753229266312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601211533) 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, 45837 + ... + 72824.

It is an arithmetic number, because the mean of its divisors is an integer number (108397737).

Almost surely, 2^1601211534 is an apocalyptic number.

1601211534 is an abundant number, since it is smaller than the sum of its proper divisors (1867516050).

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

1601211534 is a wasteful number, since it uses less digits than its factorization.

1601211534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118852.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1601211534 is about 40015.1413092594. The cubic root of 1601211534 is about 1169.9022330462.

Adding to 1601211534 its reverse (4351121061), we get a palindrome (5952332595).

The spelling of 1601211534 in words is "one billion, six hundred one million, two hundred eleven thousand, five hundred thirty-four".