31434156 has 120 divisors (see below), whose sum is σ = 93915360. Its totient is φ = 9082368.

The previous prime is 31434149. The next prime is 31434163. The reversal of 31434156 is 65143413.

31434156 is a `hidden beast` number, since 314 + 341 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (31434149) and next prime (31434163).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71385 + ... + 71823.

It is an arithmetic number, because the mean of its divisors is an integer number (782628).

Almost surely, 2^31434156 is an apocalyptic number.

31434156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31434156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46957680).

31434156 is an abundant number, since it is smaller than the sum of its proper divisors (62481204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31434156 is a wasteful number, since it uses less digits than its factorization.

31434156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 474 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 31434156 is about 5606.6171618900. The cubic root of 31434156 is about 315.5977764449.

Adding to 31434156 its reverse (65143413), we get a palindrome (96577569).

The spelling of 31434156 in words is "thirty-one million, four hundred thirty-four thousand, one hundred fifty-six".