162401591 has 16 divisors (see below), whose sum is σ = 186789888. Its totient is φ = 139821600.

The previous prime is 162401579. The next prime is 162401599. The reversal of 162401591 is 195104261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162401591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162401599) 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, 10961 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (11674368).

Almost surely, 2^162401591 is an apocalyptic number.

162401591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

162401591 is a deficient number, since it is larger than the sum of its proper divisors (24388297).

162401591 is a wasteful number, since it uses less digits than its factorization.

162401591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 162401591 is about 12743.6882808707. The cubic root of 162401591 is about 545.5862624840.

The spelling of 162401591 in words is "one hundred sixty-two million, four hundred one thousand, five hundred ninety-one".