156226381 has 4 divisors (see below), whose sum is σ = 156363264. Its totient is φ = 156089500.

The previous prime is 156226363. The next prime is 156226387. The reversal of 156226381 is 183622651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 156226381 - 2⁷ = 156226253 is a prime.

It is a super-2 number, since 2×156226381² = 48813364240714322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156226387) 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, 66715 + ... + 69016.

It is an arithmetic number, because the mean of its divisors is an integer number (39090816).

Almost surely, 2^156226381 is an apocalyptic number.

It is an amenable number.

156226381 is a deficient number, since it is larger than the sum of its proper divisors (136883).

156226381 is a wasteful number, since it uses less digits than its factorization.

156226381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136882.

The product of its digits is 17280, while the sum is 34.

The square root of 156226381 is about 12499.0552042944. The cubic root of 156226381 is about 538.5815321575.

The spelling of 156226381 in words is "one hundred fifty-six million, two hundred twenty-six thousand, three hundred eighty-one".