155229251 has 2 divisors, whose sum is σ = 155229252. Its totient is φ = 155229250.

The previous prime is 155229211. The next prime is 155229271. The reversal of 155229251 is 152922551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155229251 - 2¹⁴ = 155212867 is a prime.

It is a super-2 number, since 2×155229251² = 48192240732042002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155229211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77614625 + 77614626.

It is an arithmetic number, because the mean of its divisors is an integer number (77614626).

Almost surely, 2^155229251 is an apocalyptic number.

155229251 is a deficient number, since it is larger than the sum of its proper divisors (1).

155229251 is an equidigital number, since it uses as much as digits as its factorization.

155229251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 32.

The square root of 155229251 is about 12459.1031378667. The cubic root of 155229251 is about 537.4332360558.

It can be divided in two parts, 1552 and 29251, that added together give a palindrome (30803).

The spelling of 155229251 in words is "one hundred fifty-five million, two hundred twenty-nine thousand, two hundred fifty-one".