31401007 has 4 divisors (see below), whose sum is σ = 34255656. Its totient is φ = 28546360.

The previous prime is 31400983. The next prime is 31401011. The reversal of 31401007 is 70010413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31401007 is a prime.

It is a super-2 number, since 2×31401007² = 1972046481228098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401017) 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, 1427308 + ... + 1427329.

It is an arithmetic number, because the mean of its divisors is an integer number (8563914).

Almost surely, 2^31401007 is an apocalyptic number.

31401007 is a deficient number, since it is larger than the sum of its proper divisors (2854649).

31401007 is a wasteful number, since it uses less digits than its factorization.

31401007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854648.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 31401007 is about 5603.6601431564. The cubic root of 31401007 is about 315.4867991761.

The spelling of 31401007 in words is "thirty-one million, four hundred one thousand, seven".