55061731 has 4 divisors (see below), whose sum is σ = 55100200. Its totient is φ = 55023264.

The previous prime is 55061723. The next prime is 55061761. The reversal of 55061731 is 13716055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55061731 - 2³ = 55061723 is a prime.

It is a super-2 number, since 2×55061731² = 6063588441432722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55061731.

It is not an unprimeable number, because it can be changed into a prime (55061761) 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, 17001 + ... + 19978.

It is an arithmetic number, because the mean of its divisors is an integer number (13775050).

Almost surely, 2^55061731 is an apocalyptic number.

55061731 is a deficient number, since it is larger than the sum of its proper divisors (38469).

55061731 is a wasteful number, since it uses less digits than its factorization.

55061731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38468.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 55061731 is about 7420.3592231104. The cubic root of 55061731 is about 380.4374717022.

Adding to 55061731 its reverse (13716055), we get a palindrome (68777786).

The spelling of 55061731 in words is "fifty-five million, sixty-one thousand, seven hundred thirty-one".