31401129 has 16 divisors (see below), whose sum is σ = 44193600. Its totient is φ = 19777536.

The previous prime is 31401119. The next prime is 31401133. The reversal of 31401129 is 92110413.

It is not a de Polignac number, because 31401129 - 2⁹ = 31400617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31401119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33337 + ... + 34265.

It is an arithmetic number, because the mean of its divisors is an integer number (2762100).

Almost surely, 2^31401129 is an apocalyptic number.

It is an amenable number.

31401129 is a deficient number, since it is larger than the sum of its proper divisors (12792471).

31401129 is a wasteful number, since it uses less digits than its factorization.

31401129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 31401129 is about 5603.6710288881. The cubic root of 31401129 is about 315.4872077547.

The spelling of 31401129 in words is "thirty-one million, four hundred one thousand, one hundred twenty-nine".