31405201 has 8 divisors (see below), whose sum is σ = 32486400. Its totient is φ = 30328320.

The previous prime is 31405183. The next prime is 31405219. The reversal of 31405201 is 10250413.

It is an interprime number because it is at equal distance from previous prime (31405183) and next prime (31405219).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31405201 - 2⁹ = 31404689 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (31409201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21585 + ... + 22993.

It is an arithmetic number, because the mean of its divisors is an integer number (4060800).

Almost surely, 2^31405201 is an apocalyptic number.

31405201 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31405201 is a deficient number, since it is larger than the sum of its proper divisors (1081199).

31405201 is a wasteful number, since it uses less digits than its factorization.

31405201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 31405201 is about 5604.0343503587. The cubic root of 31405201 is about 315.5008442961.

Adding to 31405201 its reverse (10250413), we get a palindrome (41655614).

The spelling of 31405201 in words is "thirty-one million, four hundred five thousand, two hundred one".