151605551 has 2 divisors, whose sum is σ = 151605552. Its totient is φ = 151605550.

The previous prime is 151605547. The next prime is 151605569. The reversal of 151605551 is 155506151.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151605551 - 2² = 151605547 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151605521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75802775 + 75802776.

It is an arithmetic number, because the mean of its divisors is an integer number (75802776).

Almost surely, 2^151605551 is an apocalyptic number.

151605551 is a deficient number, since it is larger than the sum of its proper divisors (1).

151605551 is an equidigital number, since it uses as much as digits as its factorization.

151605551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 151605551 is about 12312.8205948109. The cubic root of 151605551 is about 533.2182858181.

The spelling of 151605551 in words is "one hundred fifty-one million, six hundred five thousand, five hundred fifty-one".