31010421 has 8 divisors (see below), whose sum is σ = 44527840. Its totient is φ = 19083312.

The previous prime is 31010401. The next prime is 31010461. The reversal of 31010421 is 12401013.

It is a happy number.

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

It is not a de Polignac number, because 31010421 - 2⁵ = 31010389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31010397 and 31010406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31010401) 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, 397531 + ... + 397608.

It is an arithmetic number, because the mean of its divisors is an integer number (5565980).

Almost surely, 2^31010421 is an apocalyptic number.

It is an amenable number.

31010421 is a deficient number, since it is larger than the sum of its proper divisors (13517419).

31010421 is a wasteful number, since it uses less digits than its factorization.

31010421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795155.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31010421 is about 5568.7001176217. The cubic root of 31010421 is about 314.1732616480.

Adding to 31010421 its reverse (12401013), we get a palindrome (43411434).

It can be divided in two parts, 310 and 10421, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 31010421 in words is "thirty-one million, ten thousand, four hundred twenty-one".