151555231 has 2 divisors, whose sum is σ = 151555232. Its totient is φ = 151555230.

The previous prime is 151555223. The next prime is 151555241. The reversal of 151555231 is 132555151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151555231 - 2³ = 151555223 is a prime.

It is a super-2 number, since 2×151555231² = 45937976086926722, 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 151555231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151555241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75777615 + 75777616.

It is an arithmetic number, because the mean of its divisors is an integer number (75777616).

Almost surely, 2^151555231 is an apocalyptic number.

151555231 is a deficient number, since it is larger than the sum of its proper divisors (1).

151555231 is an equidigital number, since it uses as much as digits as its factorization.

151555231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3750, while the sum is 28.

The square root of 151555231 is about 12310.7770266543. Note that the first 3 decimals coincide. The cubic root of 151555231 is about 533.1592850909.

The spelling of 151555231 in words is "one hundred fifty-one million, five hundred fifty-five thousand, two hundred thirty-one".