155222312251 has 4 divisors (see below), whose sum is σ = 155370285000. Its totient is φ = 155074339504.

The previous prime is 155222312197. The next prime is 155222312279. The reversal of 155222312251 is 152213222551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152213222551 = 13 ⋅11708709427.

It is a cyclic number.

It is not a de Polignac number, because 155222312251 - 2²⁵ = 155188757819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155222312551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73984801 + ... + 73986898.

It is an arithmetic number, because the mean of its divisors is an integer number (38842571250).

Almost surely, 2^155222312251 is an apocalyptic number.

155222312251 is a deficient number, since it is larger than the sum of its proper divisors (147972749).

155222312251 is a wasteful number, since it uses less digits than its factorization.

155222312251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147972748.

The product of its digits is 12000, while the sum is 31.

The spelling of 155222312251 in words is "one hundred fifty-five billion, two hundred twenty-two million, three hundred twelve thousand, two hundred fifty-one".