160901821 has 16 divisors (see below), whose sum is σ = 174859776. Its totient is φ = 147476736.

The previous prime is 160901809. The next prime is 160901837. The reversal of 160901821 is 128109061.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 160901821 - 2¹⁵ = 160869053 is a prime.

It is a super-2 number, since 2×160901821² = 51778792002232082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 160901821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160901021) 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, 220960 + ... + 221686.

It is an arithmetic number, because the mean of its divisors is an integer number (10928736).

Almost surely, 2^160901821 is an apocalyptic number.

It is an amenable number.

160901821 is a deficient number, since it is larger than the sum of its proper divisors (13957955).

160901821 is a wasteful number, since it uses less digits than its factorization.

160901821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 160901821 is about 12684.7081558860. The cubic root of 160901821 is about 543.9015791616.

The spelling of 160901821 in words is "one hundred sixty million, nine hundred one thousand, eight hundred twenty-one".