120551831 has 2 divisors, whose sum is σ = 120551832. Its totient is φ = 120551830.

The previous prime is 120551819. The next prime is 120551861. The reversal of 120551831 is 138155021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120551831 is a prime.

It is a super-2 number, since 2×120551831² = 29065487914905122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120551831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120551801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60275915 + 60275916.

It is an arithmetic number, because the mean of its divisors is an integer number (60275916).

Almost surely, 2^120551831 is an apocalyptic number.

120551831 is a deficient number, since it is larger than the sum of its proper divisors (1).

120551831 is an equidigital number, since it uses as much as digits as its factorization.

120551831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 120551831 is about 10979.6097835943. The cubic root of 120551831 is about 493.9973323464.

The spelling of 120551831 in words is "one hundred twenty million, five hundred fifty-one thousand, eight hundred thirty-one".