31212645151 has 16 divisors (see below), whose sum is σ = 33009315840. Its totient is φ = 29469414240.

The previous prime is 31212645091. The next prime is 31212645169. The reversal of 31212645151 is 15154621213.

It is a cyclic number.

It is not a de Polignac number, because 31212645151 - 2¹⁵ = 31212612383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212645251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428080 + ... + 495658.

It is an arithmetic number, because the mean of its divisors is an integer number (2063082240).

Almost surely, 2^31212645151 is an apocalyptic number.

31212645151 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31212645151 is a deficient number, since it is larger than the sum of its proper divisors (1796670689).

31212645151 is a wasteful number, since it uses less digits than its factorization.

31212645151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67974.

The product of its digits is 7200, while the sum is 31.

The spelling of 31212645151 in words is "thirty-one billion, two hundred twelve million, six hundred forty-five thousand, one hundred fifty-one".