31551401 has 8 divisors (see below), whose sum is σ = 36154560. Its totient is φ = 26972208.

The previous prime is 31551361. The next prime is 31551407. The reversal of 31551401 is 10415513.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31551401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31551407) 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, 3071 + ... + 8516.

It is an arithmetic number, because the mean of its divisors is an integer number (4519320).

Almost surely, 2^31551401 is an apocalyptic number.

It is an amenable number.

31551401 is a deficient number, since it is larger than the sum of its proper divisors (4603159).

31551401 is a wasteful number, since it uses less digits than its factorization.

31551401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11983.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 31551401 is about 5617.0633786704. The cubic root of 31551401 is about 315.9896681181.

Adding to 31551401 its reverse (10415513), we get a palindrome (41966914).

The spelling of 31551401 in words is "thirty-one million, five hundred fifty-one thousand, four hundred one".