31240901 has 4 divisors (see below), whose sum is σ = 32248704. Its totient is φ = 30233100.

The previous prime is 31240889. The next prime is 31240931. The reversal of 31240901 is 10904213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31240901 - 2⁶ = 31240837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503855 + ... + 503916.

It is an arithmetic number, because the mean of its divisors is an integer number (8062176).

Almost surely, 2^31240901 is an apocalyptic number.

31240901 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31240901 is a deficient number, since it is larger than the sum of its proper divisors (1007803).

31240901 is a wasteful number, since it uses less digits than its factorization.

31240901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007802.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31240901 is about 5589.3560451988. The cubic root of 31240901 is about 314.9496887818.

The spelling of 31240901 in words is "thirty-one million, two hundred forty thousand, nine hundred one".